Overview

Through a series of fictionalized diary entries, this case recounts the 1939 discovery by Marjorie Courtenay-Latimer (and identification by J.L.B. Smith) of a living coelacanth, a fish believed to have been extinct for 70 million years.

View details >>

Overview

Wondering how global warming will affect our planet? Scientist Jennifer McElwain studies the fossil record in order to learn more about how global warming has affected life on Earth in the past and how it might affect life on Earth in the future.

View details >>

Overview

This research profile follows paleoanthropologist Jackson Njau as he investigates ancient predators, like crocodiles and large cats, in an effort to understand how these organisms shaped the evolution of our human ancestors.

View details >>

Overview

Darwin used the words "extreme imperfection" to describe the gappy nature of the fossil record - but is this really such a problem? This article delves into the topic of transitional fossils and explores what we have learned about them since Darwin's time.

This article appears at SpringerLink.

View details >>

Overview

In this series of lessons students learn the basic principles used to determine the age of rocks and fossils by using half-life in radioactive decay and stratigraphy.

View details >>

Overview

This activity (suitable for distance learning) is designed to introduce students to the nature and process of science through the discovery of mass extinctions in the fossil record. Students will explore the fossil record of brachiopods and bivalves using the Paleobiological Database, identify patterns in their data, and generate and evaluate hypotheses. They will also document this process using the Understanding Science flowchart. Clicking the link above will download the Word file for this lesson.

View details >>

Overview

This news brief, from November 2012, describes what a new dinosaur fossil from North America has to tell us about the evolution of feathers.

View details >>

Overview

A new species of velvet worm was recently discovered in Vietnam. This news brief from September 2013 describes the key position of velvet worms in evolutionary history and how they help us better understand the fossil record of the Cambrian period.

View details >>

Overview

The ability to digest milk is a recent evolutionary innovation that has spread through some human populations. This news brief from April 2007 describes how evolution has allowed different human populations to take advantage of the nutritional possibilities of dairying and links evolution with the prevalence of lactose tolerance among people of different ethnicities.

View details >>

Overview

This news brief, from May 2012, describes new research on the end-Ordovician mass extinction and the lessons we might glean about extinctions going on around us today.

View details >>

Overview

This news brief, from August 2006, describes recent research on T. rex, with a special focus on how paleontologists move beyond the shape of the animal's bones to learn about aspects of its life that don't fossilize very well: its physiology, sensory abilities, and population dynamics.

View details >>

Overview

This news brief, from September 2011, describes the discovery of a new mammal species that highlights just how long mammals have been around. 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.

View details >>

Overview

This news brief, from September 2012, describes the aftermath of mass extinctions--what happens to surviving species in the wake of a massive extinction event.

View details >>

Overview

This news brief, from May 2006, reviews what is likely to be the most important fossil find of the year: Tiktaalik helps us understand how our own ancestors crawled out of the water and began to walk on dry land.

View details >>

Overview

Newly discovered fossils are prompting some scientists to consider a minor revision of the relationships shown on the human family tree. This news brief from September 2007 clarifies the occasionally misleading news coverage of the story.

View details >>

Overview

Lush tropical ecosystems house many times more species than temperate or Arctic regions. This news brief from November 2006 discusses the evolutionary explanation for this diversity trend and reveals why threats to tropical ecosystems may threaten diversity on a global scale.

View details >>

Overview

¿Qué es la evolución y cómo funciona? Introducción a la evolución ofrece información detallada y práctica sobre los patrones y los mecanismos de la evolución.

View details >>

Overview

Students will be introduced to a data set about mollusk genera that survived and did not survive the KT extinction event. They will formulate hypotheses regarding extinction patterns and mechanisms and analyze the data for evidence relevant to those hypotheses.

View details >>

Overview

In this article (and the linked assignments and student readings), students examine and interpret data that Melissa and Liz used to study the extinction bias in Caribbean lizards. Use the tabs at the bottom of the feature to find related videos, assignments, and lessons to build this example into a lesson sequence on extinction.

View details >>

Overview

Students are taken on an imaginary fossil hunt and hypothesize as to the identity of the creature they discover. Students revise their hypotheses as new evidence is "found."

View details >>

Overview

Students describe, measure and compare cranial casts from contemporary apes, modern humans, and fossil hominids to discover some of the similarities and differences between these forms and to see the pattern leading to modern humans.

View details >>

Overview

In this two-part laboratory students analyze skull morphology and DNA sequences among primate species to answer one of the most meaningful questions in biology: How are humans related to other animals?

View details >>

Overview

Through detailed analysis of patterns in the fossil record, scientist David Jablonski reconstructs the rules that helped dictate who lived and died in past mass extinctions. This research profile describes his surprising discoveries and their disturbing implications for the biodiversity crisis today.

View details >>

Overview

Usually, extinction operates at a fairly constant rate, culling some species while speciation generates new ones. However, at a few points in life's history the humdrum of regular extinction has been interrupted by mass extinctions. Learn more about these biodiversity crises.

View details >>

Overview

The popular press often describes scientific controversies regarding which species ancient hominin fossils represent and how they are related to one another. How should students interpret the frequent name changes experienced by our extinct relatives? What should they make of headlines that trumpet major revisions of the branching patterns on our limb of the tree of life? This article will help teachers develop instruction surrounding these issues, discourage misconceptions, and help students interpret media coverage in light of the process of science.
This article appears at SpringerLink.

View details >>

Overview

Punctuated equilibrium is sometimes erroneously cited as evidence that evolutionary biology still hasn't figured out how evolution works. In fact nothing could be further from the truth. Punctuated equilibrium builds on (not tears down!) established evolutionary theory. Find out how the process works.
This article appears at SpringerLink.

View details >>

Overview

This excerpted chapter from Carl Zimmer's book, The Tangled Bank, describes the evolutionary processes responsible for large scale patterns in the diversity of life through time. Reprinted with the permission of Roberts and Company Publishers, Inc.
This resource is available from the National Center for Science Education.

View details >>

Overview

This virtual lab teaches skills of data collection and analysis to study evolutionary processes using stickleback fish and fossil specimens.

View details >>

Overview

Evolutionary biologist Leslea Hlusko's research takes her from the deserts of Ethiopia, where she hunts for hominid and primate fossils, to a baboon colony in San Antonio where she takes thousands of measurements of the primates' imposing canines. This research profile describes how the two projects are linked by a hunt for genetic variation, a key component of natural selection.

View details >>

Overview

The setting for this case study is a paleontological dig in East Africa, where an undergraduate student has unearthed part of what appears to be an ancestral human skull. Students read the story and then examine a number of primate skulls. They are asked to build a phylogeny based on their observations.

View details >>

Overview

Evograms convey information about how a group of organisms and their particular features evolved. This article explains how to read evograms and delves into the evolutionary history of whales, tetrapods, mammals, birds, and humans.

View details >>

Overview

This web-based module leads students through an exploration of the patterns in the diversity of life across planet Earth. Students are scaffolded as they practice data interpretation and scientific reasoning skills.

View details >>

Overview

In lecture three of a four part series, evolutionary biologist David Kingsley examines the original objections to Darwin's theory and shows how modern evidence supports the theory.

This lecture is available from Howard Hughes' BioInteractive website.

View details >>