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

(Diane Isabel/iStock/Getty Images) The world's population is shifting. We're living longer than ever before, with elderly ...

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 ...

(Volodymyr Yakimchuk/Creatas Video+/Getty Images Plus) A seismic shift in the selection pressures acting on humans may have brought us to a major turning point in our evolutionary journey. According ...

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 ...

Scientists have identified a new member on the genetic family tree of an endangered pupfish native to south-central New Mexico. "We went into this thinking that there was one species of conservation ...