Local pressures such as climate or diet that affect natural selection are only partly responsible for differences in the genetic makeup of human populations, a new study finds. Migrations, the ...

The unexpected discovery of a new type of genetic variation suggests that natural selection -- the force that drives evolution -- is both more powerful and more complex than scientists have thought.

A genetic variation seen worldwide in which people either taste or do not taste a bitter, synthetic compound called PTC has been preserved by natural selection, University of Utah and National ...

In this Spotlight, we ask whether modern humans are still evolving or whether we have stepped out of the path of natural selection. Share on Pinterest Does Charles Darwin’s theory of evolution still ...

Ten thousand years ago, much of North America was covered with ice. As the glaciers retreated they scooped out an intricate landscape of low hills, small lakes and rushing streams. Slowly, ...