Modes of speciation
Find out how a shift in the course of river can alter evolutionary history. Speciation can occur in different ways depending upon how individuals in a population are distributed.
This article is located within Evolution 101.

Aloha - spider style!
This research profile follows Dr. Rosemary Gillespie to Hawaii as she evaluates hypotheses about the evolution of the colorful happy-face spider.

Ernst Mayr: Speciation
Ernst Mayr conceptualized the process of speciation by geographic isolation, a key element in modern evolutionary theory.
This article is located within History of Evolutionary Thought.

Evo in the news: Happy 200th, Darwin!
This news brief, from February 2009, celebrates Darwin's bicentennial by examining what we've learned about the evolution of the Galapagos finches since Darwin's time.

Evo in the news: Sex, speciation, and fishy physics  
More than 500 species of cichlid fish inhabit Africa's Lake Victoria. This news brief from March 2009 explains new research suggesting that the physics of light may have played an important role in cichlid diversification and in the recent drop in their diversity.

Parsimonious explanations for punctuated patterns
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.

Ring species: Unusual demonstrations of speciation  
Ring species, though a rare situation, provide valuable insights into how speciation occurs.
This article appears at ActionBioscience.org.

Species, speciation and the environment  
Niles Eldredge gives a historical overview of scientists' thinking on the process of speciation, along with modern perspectives on this issue.
This article appears at ActionBioscience.org.