Anyone who does not belong in the environment in which they are found.
Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matter (adaptation). You'll also learn what a genetic bottleneck is, and how genetic bottlenecks affect conservation...
Ugandan monkeys harbor evidence of infection with unknown poxvirus
Extending knowledge of Escherichia coli metabolism by modeling and experiment
When One Gene Has Two Roles, Its Second Function May Be Missed
Simple Ways to Face Down Your Fears