Evolution is always happening — so why can't we see it? A biologist explains the timescale problem, election pressure, and ...

As the U.S. celebrates the 250th anniversary of the Declaration of Independence this year, here are eight ways its political system stands apart from the world’s other 105 democracies. Across major ...

Eutherian mammals living in China after the end-Cretaceous extinctions evolved larger tooth sizes first before becoming more specialized in their biting performance, mirroring a similar pattern in ...