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    <title>Understanding Evolution</title>
    <link>http://evolution.berkeley.edu</link>
    <description>your one-stop source for information on evolution</description>
    <language>en-us</language>
	
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      <title>Evo in the news update: Genetic engineering vs. evolution</title>
      <pubDate>Thu, 3 April 2014 12:27:00 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/140403_rootworm</link>
      <description><![CDATA[In the late 1990s, a new weapon in the fight against agricultural pests was introduced: Bt corn. The new maize variety was genetically engineered to carry genes from the bacterium Bacillus thurinigiensis (hence the moniker "Bt") that cause the crop to produce an all-natural pesticide. This meant that growers could get good yields from their cornfields without spraying on so many toxins. Since then, many farmers have jumped on this bandwagon. In 2012, more than 69 million hectares were planted with Bt crops — an area about the size of Texas! There has been much debate over the risks of this technological advance, but now it appears that the downfall of Bt corn might be the very problem that it was supposed to solve in the first place: agricultural pests, in particular the western corn rootworm. These beetle larvae eat the roots of corn plants potentially ruining the crop. In recent years, more and more larvae that are resistant to the effects of the Bt toxin have been showing up in fields and chewing their way into plants. How and why did this happen? It all comes down to evolution. <a href="http://evolution.berkeley.edu/evolibrary/news/140403_rootworm">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: Evolutionary history is more than skin deep</title>
      <pubDate>Thu, 5 March 2014 15:05:00 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/140305_skincolor</link>
      <description><![CDATA[Many of the marks that evolutionary history has left on our bodies are invisible. Lactose tolerance, a predisposition towards diabetes, genes that contribute to breast cancer, and many other inconspicuous traits are legacies of the paths that our ancestors took as they left or stayed in Africa between 60 and 125 thousand years ago. However, other markers of these unique evolutionary histories are perfectly obvious, perhaps most notably skin color. It's clear that people whose ancestors hail from different parts of the earth have differently colored skin and that this is related to how much of the sun's radiation hits that part of the planet. The less radiation, the lighter the native population's skin color tends to be. This is a great example of recent evolution in human populations. But what if we go back deeper in our evolutionary history, back to when all of humanity lived in Africa? At that time, all humans had darkly pigmented skin. A new study sheds light on how and why this skin pigmentation evolved. <a href="http://evolution.berkeley.edu/evolibrary/news/140305_skincolor">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: The deep roots of diabetes</title>
      <pubDate>Thu, 6 Feb 2014 07:08:00 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/140204_diabetes</link>
      <description><![CDATA[The modern diabetes epidemic is caused, not by a virulent pathogen, but by the spread of an even stealthier invader: the Western lifestyle. As people around the world have begun to eat less healthily, lead more sedentary lives, and live to older ages, adult onset diabetes (type 2 diabetes) has become common in places where the disease was previously unknown. Between 1985 and 2002, the number of people with diabetes grew from 30 million to 217 million, and this figure is expected to exceed 366 million by 2030. But the epidemic has not been even-handed. Even accounting for differences in lifestyle, some populations have been hit particularly hard. Mexicans and Latin Americans, for example, have nearly twice the chance of developing diabetes that non-Hispanic white Americans do. New research addresses these disparities. Last month, scientists announced that they'd discovered a gene that helps explain the difference in diabetes risk among many populations. In a strange twist, the gene version in question traces its ancestry back to Neanderthals! What exactly is going on here? <a href="http://evolution.berkeley.edu/evolibrary/news/140204_diabetes">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: Bottlenecks, BRCA, and Breast Cancer</title>
      <pubDate>Wed, 11 Dec 2013 15:08:00 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/131211_bottlenecks</link>
      <description><![CDATA[As tests for genes that contribute to more diseases become available and, in many cases, become cheaper, we will increasingly be faced with decisions about how much we want to know about our future health prospects. Would you want to know if you carried a gene that conferred a 60% chance of developing Huntington's disease by age 65? Or that multiplied your chances of having a stroke by five—even though the risk of having a stroke in any given year would still be extremely low? How much would you pay for a test that, for more than 99.5% of women will reassure them that nothing is wrong, but in the other cases will reveal that one's odds of developing ovarian cancer are 39%? A prime example of this situation made the front page of the New York Times last month—and highlighted the deep connections that genetic testing has to the evolutionary history of human populations... <a href="http://evolution.berkeley.edu/evolibrary/news/131211_bottlenecks">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: Lumping or splitting in the fossil record</title>
      <pubDate>Thu, 1 Nov 2013 15:08:00 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/131104_lumperssplitters</link>
      <description><![CDATA[Rarely does pure science take top billing in the news, but this past month saw a notable exception. The front page of the New York Times was occupied by the image of an ancient hominid skull caked in dirt. This 1.8 million-year-old fossil, excavated in the Republic of Georgia, represents the oldest complete adult cranium of a hominid yet discovered. That alone would be significant news, but the context in which the fossil was preserved adds even more weight to the discovery... <a href="http://evolution.berkeley.edu/evolibrary/news/131104_lumperssplitters">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: The legless lizards of LAX</title>
      <pubDate>Wed, 16 Oct 2013 15:12:49 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/131005_leglesslizards</link>
      <description><![CDATA[Last month, biologists announced the discovery of four new species of lizard, not in an exotic tropical jungle, but right under our noses. The new-to-science animals (from the genus <em>Anniella</em>) were found at several unlikely locations - including in an abandoned lot in Bakersfield, California, and near the runway at Los Angeles International Airport. But don't count on catching sight of one of these critters the next time you have a layover at LAX. First, they are small - less than 8 inches long. Second, they live mostly underground (the researchers had to tempt them out of hiding by leaving pieces of cardboard and plywood on the ground). And third, even if you did see one, you might not recognize it as a lizard. The four new species have no legs and could easily be mistaken for snakes! So why <em>aren't</em> these sleek, scaled creatures snakes, and how did they avoid detection for so long? <a href="http://evolution.berkeley.edu/evolibrary/news/131005_leglesslizards">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: A new old animal</title>
      <pubDate>Mon, 9 Sep 2013 15:12:49 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/130905_newoldanimal</link>
      <description><![CDATA[<em>Eoperipatus totoro</em> doesn't look much like a fearsome predator. In fact, this two-inch long critter resembles nothing so much as a plush, candy-colored caterpillar with wriggly antennae.  But this little known animal is no caterpillar. It is a velvet worm - a.k.a. an onychophoran, a group of organisms that today live in tropical regions and trap their insect prey using jets of sticky slime, a-la Spider-Man. Discovered in Vietnam and officially described just last month, this particular species may be new to science, but the onychophorans as a group have long been of interest to biologists for their important role in  evolutionary history... <a href="http://evolution.berkeley.edu/evolibrary/news/130905_newoldanimal">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: No more mystery meat</title>
      <pubDate>Wed, 10 Apr 2013 15:48:37 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/130401_beef</link>
      <description><![CDATA[Diners sitting down to enjoy a burger couldn't be faulted for wondering, "Where's the beef ... from?" After all, just a few months ago, European consumers were dismayed to discover that many products marketed as beef actually contained large quantities of horse meat. Genetic fingerprinting, which was used to detect the imposter beef, can identify meat as a particular species or even a particular population. However, other analyses of genetic data can trace the source of a patty, McNugget, or filet, not just to a particular breed or population, but back in time. Using these techniques, scientists have uncovered the deep evolutionary origins of domesticated animals (such as sheep) and major crop plants (such as corn). Now, they've applied those techniques to cattle as well.  <a href="http://evolution.berkeley.edu/evolibrary/news/130401_beef">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: The recent roots of dental disease</title>
      <pubDate>Mon, 4 Mar 2013 13:30:15 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/130301_plaque</link>
      <description><![CDATA[Science has now provided an excuse for those of us used to being chided by our dentists for not brushing often enough: blame your cavities on the Industrial Revolution. New research suggests that the dietary changes associated with the Industrial Revolution 150 years ago (and with the invention of agriculture 10,000 years ago) caused an epidemic of tooth decay and gum disease. The culprits are oral bacteria. The human mouth is the native home of a wide variety of microbes, some helpful species and some harmful. Over the course of human history, eating more starch and sugar seems to have tipped the balance in favor of the disease-causing bacteria. Even without ultrasonic toothbrushes and mouthwashes, our ancestors may have had healthier teeth than we do! <a href="http://evolution.berkeley.edu/evolibrary/news/130301_plaque">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: Influenza, an ever-evolving target for vaccine development</title>
      <pubDate>Fri, 1 Feb 2013 11:34:15 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/130201_flu</link>
      <description><![CDATA[It's that time of year again. Coughing coworkers, student absences, and reminders to get your shot are sure signs that flu season is upon us. This year's epidemic seems to have struck earlier and harder than usual — all amid concerns over shortages of the flu vaccine. While some vaccines provide lifelong protection with one or a few doses (e.g., measles, mumps, and polio), the flu requires a new shot every year. And in some years, the flu shot is hardly effective at all. Why is the flu vaccine different from so many other vaccines? A look at the evolution of the flu virus can explain the weaknesses of current vaccines and points the way towards a vaccine that could provide long-lasting, universal protection.]]></description>
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      <title>CSI: Olduvai Gorge. The work of Jackson Njau</title>
      <pubDate>Fri, 1 Feb 2013 11:33:46 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/article/njau_01</link>
      <description><![CDATA[Follow paleoanthropologist Jackson Njau as he examines fossil evidence for clues of crocodile predation on early hominids.]]></description>
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      <title>Evo in the news update: Grasshoppers change their tune. Is it evolution in action?</title>
      <pubDate>Fri, 1 Feb 2013 11:32:45 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/121201_grasshoppers</link>
      <description><![CDATA[Whizzing down the interstate, the sounds that concern most of us include the radio's tuning, conversation with our fellow passengers, and, of course, the ominous howl of a siren approaching from behind. But just outside the car door, the soundscape is quite different. On busy thoroughfares, traffic noise approximates a non-stop, low-pitched roar that necessitates shouting to communicate if one is unlucky enough to need to change a tire at the side of the road. Now, new research shows that it is not just humans who strain to be heard over the din of a highway.]]></description>
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      <title>How boogieing birds evolved: The work of Kim Bostwick</title>
      <pubDate>Fri, 1 Feb 2013 11:32:00 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/article/bostwick_01</link>
      <description><![CDATA[When ornithologist Kim Bostwick goes hunting with her binoculars, she's not just looking for birds; she's looking for untold evolutionary stories.]]></description>
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      <title>Using trees to uproot HIV: The work of Satish Pillai </title>
      <pubDate>Fri, 1 Feb 2013 11:24:59 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/article/pillai_01</link>
      <description><![CDATA[See how scientist Satish Pillai uses phylogenetics to investigate the possibilities of developing an effective vaccine and of curing HIV.]]></description>
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      <title>Evo in the news update: A new look at dinosaur fossils pushes back the evolution of feathered wings</title>
      <pubDate>Mon, 5 Nov 2012 11:07:09 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/121101_dinofeathers</link>
      <description><![CDATA[Last month, paleontologists from Canada, the U.S., and Japan announced an exciting discovery: feathered dinosaur fossils in North America. When <i>Ornithomimus edmontonicus</i> was first studied in the 1930s, its ostrich-like skeleton earned it a name that translates to "bird mimic." Now new fossils and a re-evaluation of old ones have revealed that its body covering also fits the moniker. A newly unearthed, year-old juvenile specimen is covered in downy, hair-like feathers, and re-examination of an adult specimen turned up traces of standard feathers with a central shaft. While most popular reporting has focused on the idea that these shafted feathers may have been used to attract mates, the real news in this research lies elsewhere. <a href="http://evolution.berkeley.edu/evolibrary/news/121101_dinofeathers">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: Acidic oceans prompt evolution</title>
      <pubDate>Thu, 25 Oct 2012 11:16:06 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/121001_acidicoceans</link>
      <description><![CDATA[It's no secret that greenhouse gases warm the planet and that this has dire consequences for the environment &#151; whole islands swallowed up by rising seas, animal and plant species stressed by higher temperatures, and upsets in ecological interactions as populations move to cooler areas. However, carbon dioxide has another, less familiar environmental repercussion: making the Earth's oceans more acidic. Higher levels of carbon dioxide in the atmosphere mean that more carbon dioxide dissolves in the ocean. This dissolved carbon dioxide forms carbonic acid &#151; the same substance that helps give carbonated beverages their acidic kick. While this process isn't going to make the ocean fizzy anytime soon, it is introducing its own set of challenges for marine organisms like plankton and coral. <a href="http://evolution.berkeley.edu/evolibrary/news/121001_acidicoceans">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news update: What comes after mass extinctions?</title>
      <pubDate>Wed, 12 Sep 2012 13:16:51 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/120901_afterextinction</link>
      <description><![CDATA[Extinction is a fact of modern life. Humanity's relentless encroachment on the wilderness has marred the diversity of life with conspicuous gaps where the Tasmanian tiger, the Passenger Pigeon, the Ivory-billed Woodpecker, and countless others used to be. As these extinctions accumulate, the Earth inches closer and closer to its sixth mass extinction. We are all too familiar with the concept of mass extinction &#151; a disaster strikes and sets off a chain of events that result in a massive die-off. But you may not have considered what comes next: what happens to surviving species in the wake of a massive extinction event? Recent research suggests that mass extinctions shake up life on Earth in surprising ways.  <a href="http://evolution.berkeley.edu/evolibrary/news/120901_afterextinction">Read the rest of the story</a>.]]></description>
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      <title>Evo in the news update:  Evolution at the scene of the crime</title>
      <pubDate>Thu, 2 Aug 2012 16:05:13 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/060301_crime</link>
      <description><![CDATA[The tests confirm, beyond a shadow of doubt, that Roger Keith Coleman did it, but Alan Crotzer did not. In 1992, Coleman was executed for the rape and murder of his sister-in-law. In 1981, Crotzer was sentenced to 130 years in prison for a robbery and pair of rapes. Though the crimes themselves are old, judgments long since rendered, and punishments already meted out, for many observers, the actual guilt or innocence of these two defendants for two different crimes was only just settled by an increasingly important test: the DNA fingerprint. Recent DNA tests revealed that it was, indeed, Coleman's semen in the body of his victim, and that he had actually committed the crime for which he was executed more than 10 years ago. And recent DNA tests revealed that Krotzer is not a rapist and has spent 24 years in prison for crimes he did not commit.  <a href="http://evolution.berkeley.edu/evolibrary/news/060301_crime">Read the rest of the story, including the latest update</a>.]]></description>
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      <title>Evo in the news update: Fighting the evolution of malaria in Cambodia</title>
      <pubDate>Tue, 10 Jul 2012 11:29:37 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/091201_malaria</link>
      <description><![CDATA[Malaria infects more than 250 million people a year and kills almost one million &#151; most of them children. The disease is curable with the right treatment, but this year scientists announced that it may not be curable for long. Strains of malaria that have evolved resistance to our most effective drug, artemisinin, have been discovered in western Cambodia and could spread to the rest of the world. Understanding the environment that contributed to this worrisome evolutionary step is helping scientists, doctors, and policymakers develop effective strategies for keeping resistant strains of malaria in check. <a href="http://evolution.berkeley.edu/evolibrary/news/091201_malaria">Read the rest of the story, including the latest update</a>.]]></description>
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      <title>Evo in the news update: Evolution and the avian flu</title>
      <pubDate>Thu, 7 Jun 2012 11:45:27 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/051115_birdflu</link>
      <description><![CDATA[The warnings are dire. The economic cost for developed countries alone is estimated at 550 billion dollars, and the projected worldwide death toll ranges between 2 million and 150 million people. The very real specter behind these warnings is, of course, avian flu. As the virus spreads through bird populations, governments have heeded the warnings of health officials and begun to cull infected flocks. More than 150 million birds have been killed so far, with further control efforts looming. However, less than 200 human cases of avian flu have been identified thus far. Why the global concern over localized outbreaks? <a href="http://evolution.berkeley.edu/evolibrary/news/051115_birdflu">Read the rest of the story, including the latest update</a>.]]></description>
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      <title>Evo in the news: Lessons for today in ancient mass extinctions</title>
      <pubDate>Fri, 11 May 2012 09:47:51 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/120501_habitatloss</link>
      <description><![CDATA[If you follow environmental news at all, you'll be familiar with the most common cause of extinction in the world today: habitat loss. Habitat destruction threatens the survival of some the world's most charismatic organisms &#151; animals like the giant panda, the Sumatran tiger, and the Asian elephant. Humans have encroached on the wilderness in order to farm, mine, log, and build, and in the process, we've pushed the natural inhabitants of those areas into smaller and smaller refuges. Making matters worse, global climate change caused by our production of greenhouse gases is altering the environments within those refuges, forcing species to contend with new challenges. While these might seem like entirely modern problems, recent research indicates that's not the case &#151; and that current levels of habitat loss and climate change could have devastating consequences. Read the whole story <a href="http://evolution.berkeley.edu/evolibrary/news/120501_habitatloss">here</a>.]]></description>
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      <title>Evo in the news: Climate change causes loss of genetic diversity</title>
      <pubDate>Tue, 3 Apr 2012 13:45:14 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/120301_chipmunks</link>
      <description><![CDATA[If you'd visited Tuolumne Meadows in Yosemite National Park 100 years ago, you probably would have encountered the alpine chipmunk, <i>Tamias alpinus</i>. Today, however, park visitors will have to hike up a nearby mountain to see one of these critters. That's because this species is sensitive to temperature — and over the last hundred years of global climate change, Yosemite has warmed by about 5.5 degrees Fahrenheit. As the temperature increased, the chipmunks retreated to higher and higher elevations where it was cooler. Today, they occupy a fraction of their original range. If climate change continues, they could be squeezed right off the tops of their mountains and out of existence.  Read the whole story <a href="http://evolution.berkeley.edu/evolibrary/news/120301_chipmunks">here</a>.]]></description>
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      <title>Evo in the news: Evolutionary history in a tiny package</title>
      <pubDate>Thu, 1 Mar 2012 10:26:05 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/120201_tinychameleons</link>
      <description><![CDATA[Scientists discover new species all the time, but usually these new species are microbes, plants, insects, and other forms of non-vertebrate life. Few vertebrate species have thus far evaded the curious gaze of biologists intent on understanding the diversity of life on Earth — that is, unless the vertebrate in question happens to be very, very tiny. Last month, scientists announced the discovery of not one, but four miniscule lizard species. The smallest of these new chameleons, which live in the far north of the African island of Madagascar and inhabit leaf litter, reaches an adult body size of just two centimeters. Read the whole story <a href="http://evolution.berkeley.edu/evolibrary/news/120201_tinychameleons">here</a>. ]]></description>
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      <title>Evo in the news: Hybrid sharks aren't "trying" to adapt</title>
      <pubDate>Thu, 2 Feb 2012 09:43:17 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/120101_sharkhybrid</link>
      <description><![CDATA[Last month, biologists announced the discovery of hybrid sharks in Australian waters. The new sharks may not warrant a marine park attraction — they look much like their closely-related parent species — but do represent an unexpected twist of biology and evolution. This is the first time that scientists have found evidence of shark hybridization — an event that was thought to be rare because, unlike the many fish that simply release eggs and sperm into the water, sharks mate. Clearly, though, the widely-distributed common blacktip shark and the Australian blacktip shark (which is restricted to northern and eastern Australia) have few qualms about each other: 57 apparently healthy hybrid individuals were discovered in the first investigation of these animals. What does this mean for the future evolution of blacktip sharks? Read the whole story <a href="http://evolution.berkeley.edu/evolibrary/news/120101_sharkhybrid">here</a>.]]></description>
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      <title>Evo in the news: When fighting leukemia, evolutionary history matters</title>
      <pubDate>Fri, 2 Dec 2011 11:31:20 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/111101_hla</link>
      <description><![CDATA[In the next few months, college students across the country will be offered the chance to save a life by swabbing cells from the insides of their cheeks and registering as a potential marrow donor with Be The Match. The Give A Spit About Cancer campaign, which launched in October, helps college students organize marrow donor registry drives. The cells collected in these drives are used to figure out who might be able to donate marrow or blood stem cells to a patient with a life-threatening disease like leukemia. While ethnicity is irrelevant to most medical procedures, marrow and blood stem cell transplants are an exception to this rule. Read the whole story <a href="http://evolution.berkeley.edu/evolibrary/news/111101_hla">here</a>.]]></description>
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      <title>Evo in the news: An antibiotic that exploits evolutionary history </title>
      <pubDate>Tue, 18 Oct 2011 10:41:47 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/111001_tuberculosis</link>
      <description><![CDATA[This month, the World Health Organization announced that tuberculosis cases are on the decline for the first time in at least 20 years. We seem finally to be winning what has been a very long battle. Tuberculosis bacteria have been attacking us since modern humans began to migrate out of Africa around 40,000 years ago. If you enjoy classic literature, you'll be familiar with the cough, fever, and weight loss of consumption (the old-fashioned term for tuberculosis), which used to be a near certain death sentence. That changed when the aminoglycoside antibiotic streptomycin was discovered in 1943.  Read the whole story <a href="http://evolution.berkeley.edu/evolibrary/news/111001_tuberculosis">here</a>.]]></description>
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      <title>Evo in the news: The evidence lines up in early mammal evolution</title>
      <pubDate>Mon, 12 Sep 2011 11:13:25 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/110901_earlymammals</link>
      <description><![CDATA[Back in the Jurassic, dinosaurs may have dominated terrestrial ecosystems, but they were not alone. Scurrying around their feet and clinging to the trees above them were the fuzzy ancestors of their successors. When most of the dinosaurs perished, the surviving mammals diversified into the dinosaurs' niches, where they remain today. Last month, scientists reported on the discovery of a fossil mammal from China that would have lived alongside the dinosaurs and that, at 160 million years old, represents one of the earliest mammals known. Read the whole story <a href="http://evolution.berkeley.edu/evolibrary/news/110901_earlymammals">here</a>.]]></description>
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      <title>Evo in the news update: Sex, speciation, and fishy physics</title>
      <pubDate>Mon, 11 Jul 2011 13:51:53 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/090301_cichlidspeciation</link>
      <description><![CDATA[For the summer holidays, Evo in the News will be revisiting past news items to bring you up-to-date on recent research and developments.  In March of 2009, we reported on how the physics of light seems to have spurred speciation in Lake Victoria's cichlid fish.  This summer, we report on new evidence that backs up this hypothesis--and that highlights the threat posed to these fish by pollution that clouds the lake's waters.  See the updated story <a href="http://evolution.berkeley.edu/evolibrary/news/090301_cichlidspeciation">here</a>.]]></description>
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      <title>Evo in the news update: Quick evolution leads to quiet crickets</title>
      <pubDate>Tue, 14 Jun 2011 11:42:11 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/061201_quietcrickets</link>
      <description><![CDATA[For the summer holidays, Evo in the News will be revisiting past news items to bring you up-to-date on recent research and developments. In December of 2006, we reported on a bizarre case of evolution in action. Crickets on the Hawaiian island of Kauai were being parasitized by flies that track the crickets down by following their mating chirps. When a new mutation arose that caused male crickets to develop silent wings, it swept through the population since it helped male crickets avoid being eaten alive by the flies' larvae. In June of 2008, we reported on new research into the genetics of this mutation. This year, we continue to follow the story of the silent crickets. Researchers recently announced that they've looked more closely at the crickets' genetics in order to learn how crickets arrived on Hawaii in the first place and how the mutation might have gotten a foothold in the island population.  Read the whole update <a href="http://evolution.berkeley.edu/evolibrary/news/061201_quietcrickets">here</a>.]]></description>
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      <title>Evo in the news: "Error. Greed does not compute."</title>
      <pubDate>Tue, 24 May 2011 10:54:47 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/110501_robots</link>
      <description><![CDATA[Swarms of tiny robots have given up their selfish ways and started sharing resources for the greater good. Though this might sound like the plot of a bad summer blockbuster, it is real news. This month, a team of Swiss researchers announced that they've used robots to simulate biological evolution. The simple, mobile robots &#151; each a little larger than a sugar cube &#151; began their lives directionless, meandering aimlessly into walls. But after a few generations of natural selection, their computer programs evolved so that they became efficient foragers, purposefully collecting disks that represent food. None of that is particularly surprising. Scientists have long been able to simulate evolution through computer programs that mimic the processes of genetic inheritance, mutation, recombination, and reproduction. What is noteworthy is that many of these robots eventually evolved to help one another, sacrificing personal success to aid other robots in their group. <a href="http://evolution.berkeley.edu/evolibrary/news/110501_robots">Read the rest of the story.</a>]]></description>
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      <title>Evo in the news: Gender-biased bacteria throw off an evolutionary balance</title>
      <pubDate>Fri, 22 Apr 2011 10:17:40 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/110401_whiteflies</link>
      <description><![CDATA[This month, biologists reported that a bacterial infection has run rampant in populations of a major crop pest in the Southwest. The bacterium (called <i>Rickettsia</i>) is a close relative of the species that causes typhus in humans. Its host is the sweet potato whitefly, a tiny bug that can occur in large enough numbers to form visible clouds. Whiteflies suck the sap from plants and spread crop diseases, causing hundreds of millions of dollars of damage in a single season. In just a few years, the percentage of southwestern whiteflies infected with <i>Rickettsia</i> has skyrocketed from 1% to more than 90%. Unfortunately, this is not the boon for local farmers that it might seem. <a href="http://evolution.berkeley.edu/evolibrary/news/110401_whiteflies">Find out how the bacteria actually help whiteflies.</a>]]></description>
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      <title>Evo in the news: Toxic river means rapid evolution for one fish species</title>
      <pubDate>Mon, 21 Mar 2011 09:49:44 -0700</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/110301_pcbresistantcod</link>
      <description><![CDATA[Though we often think of evolution as occurring at a snail's pace, one fish species is highlighting just how quickly evolution occurs &#151; in the right circumstances. Between 1947 and 1976, General Electric released more than a million pounds of PCBs into the Hudson River. PCBs can kill fish and seabirds and have been linked to cancer and other serious health problems in humans. PCBs were banned in 1979, but the toxins have remained at high levels in the Hudson because they settle into the sediments on the bottom of the river and don't break down. Now, scientists have discovered that, over the past 60 years, one bottom-feeding fish species, the Atlantic tomcod, has evolved resistance to PCBs.]]></description>
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      <title>Evo in the news: Bad at estimating? Blame evolution</title>
      <pubDate>Wed, 9 Feb 2011 14:12:35 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/110201_throwing</link>
      <description><![CDATA[The next time you are in the kitchen, try this experiment: pick up a box of butter (four sticks) in one hand and a box of saltines (four packets) in the other. Which is heavier? If you said the butter, you are not alone. Most people would identify the box of butter as the heavier object &#151; even though, if you look at the labels, you'll see that they both weigh exactly one pound! This is an example of the size-weight illusion, and it is incredibly common. <a href="http://evolution.berkeley.edu/evolibrary/news/110201_throwing">Read more to see the evolution (and baseball) connection.</a>]]></description>
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      <title>Evo in the news: Genetic variation helps rescue endangered panthers</title>
      <pubDate>Wed, 1 Dec 2010 10:22:21 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/101201_panthers</link>
      <description><![CDATA[This fall, biologists announced the apparent success of a last-ditch conservation effort: the Florida panther, once slated for extinction, has been given a second lease on life by the infusion of genetic variation. In the 1900s, this population nosedived because of hunting and habitat loss. By the 1990s, there were fewer than 30 Florida panthers left. <a href="http://evolution.berkeley.edu/evolibrary/news/101201_panthers">Find out about the evolutionary basis of this successful conservation plan.</a>]]></description>
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      <title>Evo in the news: Spreading disease on evolutionary timescales</title>
      <pubDate>Mon, 1 Nov 2010 11:18:33 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/101101_malaria</link>
      <description><![CDATA[If you are trying to stay healthy this cold and flu season, you may find yourself washing your hands frequently and avoiding crowded places like schools and airports. That's because most infectious diseases that we are familiar with are passed from human to human &#151; and the more human germs you come into contact with, the more likely you are to have one make its home in your body. However, on evolutionary timescales, pathogens don't necessarily respect species boundaries. Biologists have discovered more and more cases in which diseases have passed from another species to humans. <a href="http://evolution.berkeley.edu/evolibrary/news/101101_malaria">Find out how a deadly strains of malaria jump between chimp, gorilla and human hosts.</a>]]></description>
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      <title>Evo in the news: Evolving altitude aptitude</title>
      <pubDate>Fri, 1 Oct 2010 11:31:49 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/101001_altitude</link>
      <description><![CDATA[If you live in the lowlands, you may have experienced the huffing and puffing that typically accompany a trip to higher altitudes. That's because oxygen levels go down as one goes up. Travelling to Denver from sea level means a 17% decrease in available oxygen. Our bodies compensate for even this small change with faster breathing and a higher heart rate  &#151;  at least until we acclimate to the thinner atmosphere. And a loftier vacation spot (for example, La Paz, Bolivia at 11,942 feet) could bring on serious altitude sickness with insomnia, nausea, and swelling  &#151;  but not for everyone. Tibetan highlanders have no trouble living at 13,000 feet year in year out, and many Nepalese Sherpas (who are ethnically Tibetan) climb parts of Mount Everest without the supplementary oxygen most people require. <a href="http://evolution.berkeley.edu/evolibrary/news/101001_altitude">Read more about the adaptations of the Tibetan highlanders.</a>]]></description>
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      <title>Evo in the news: Bed bugs bite back thanks to evolution</title>
      <pubDate>Wed, 1 Sep 2010 11:35:50 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/100901_bedbugs</link>
      <description><![CDATA[Bed bugs might sound like an old-fashioned problem, but now they are back&#151;and with a vengeance. Fifty years ago, the blood-sucking pests were nearly eradicated in the United States thanks in part to the use of pesticides like DDT. Today, they are creeping over sheets &#151; and tormenting hapless sleepers &#151;  across the country. New York was recently declared America's most bed-bug-infested city: Times Square movie theatre, the Empire State Building, and the offices of a major fashion magazine  &#151;  not to mention the homes of 11,000 New Yorkers who filed official complaints about the vermin last year  &#151;  have all housed these itchiest of bedfellows. And the Big Apple is not alone in its disturbed slumber. This summer, the Centers for Disease Control and Prevention (CDC) and the Environmental Protection Agency (EPA) issued a joint statement on the resurgence of bed bugs throughout the country. <a href="http://evolution.berkeley.edu/evolibrary/news/100901_bedbugs">Read about how bedbugs evolve to overcome control measures.</a>]]></description>
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      <title>Evo in the news: Making sense of ancient hominin DNA</title>
      <pubDate>Sat, 1 May 2010 14:18:08 -0800</pubDate>
      <link>http://evolution.berkeley.edu/evolibrary/news/100501_xwoman</link>
      <description><![CDATA[In the last two months, news outlets have been abuzz with the announcement of what many suggested was a new hominin species. In 2008, a 40,000 year old pinky bone from a child was discovered in a Siberian cave. The bone was not enough to identify the species of its possessor, but since both Neanderthals and humans are known to have lived in the area at the time, scientists assumed it belonged to one of these two species. That all changed in March of this year, when German researchers announced that they'd managed to extract DNA from the fossil &#151; and it didn't match up to the known genetic sequences of either humans or Neanderthals. <a href="http://evolution.berkeley.edu/evolibrary/news/100501_xwoman">Find out more.</a>]]></description>
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