Studies have suggested that genes under strong sexual selection tend to evolve rapidly, particularly those associated with ...

Organelles in cells were originally often independent cells, which were incorporated by host cells and lost their ...

Organelles in cells were originally often independent cells, which were incorporated by host cells and lost their independence in the course of evolution. Biologists are now examining the way in which ...

Chimpanzees bear genetic adaptations that help them thrive in their different forest and savannah habitats. Some of the ...

Campylobacter infections are the most common foodborne illnesses in the U.S., sickening an estimated 1.5 million people each ...

Modern humans descended from not one, but at least two ancestral populations that drifted apart and later reconnected, long before modern humans spread across the globe.