In "The Descent of Man," he described the appendix as a vestige: a leftover from plant-eating ancestors with larger digestive organs. For more than a century, that interpretation shaped both textbook ...

When closely related species mate, their offspring sometimes survive but cannot reproduce. This pattern often affects males ...

The story of life’s beginnings gets stranger when you look closely at viruses. These tiny entities seem to sit at the edge of ...

Research findings are available online in the journal Current Biology 00004-7). The original story “ Researchers discover a ...

Why does a Caribbean angelfish sometimes resemble its Indo-Pacific cousin, even though they have never lived in the same ocean? Why do coral reefs harbor such a wide range of stripes, spots and ...