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

Here’s what you’ll learn when you read this story: In the 1960s, Kimura’s neutral theory revolutionized molecular biology by arguing most DNA changes are random, not adaptive. A new study finds ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A strange tiny species of crustacean has challenged the way we think ...

The theory of evolution by natural selection was first formulated in Darwin’s book “On the Origin of Species” in 1859. It ...

Natural selection is usually understood in the context of change. When organisms deviate from the norm, they may gain advantages that let their lineages outlast those of their less-adaptable relatives ...

Every morning in Miami, our fieldwork begins the same way. Fresh Cuban coffee and pastelitos – delicious Latin American pastries – fuel our team for another day of evolutionary detective work. Here we ...

Depending upon how you do the counting, there are around 9 million species on Earth, from the simplest single-celled organisms to humans. It’s reassuring to imagine that complex bodies and brains like ...