In this AI-generated illustration of Earth at the dawn of life, a distant volcano towers over shallow pools of water. It is possible the earliest life forms evolved in such environments. Credit: ...

The often-mentioned fact that humans and chimpanzees are 99.9 percent identical in their DNA is hard to accept for some people, who can't comprehend how we could share so much of our basic genetic ...

When scientists discovered DNA and its double-helix form, they had finally identified the molecules that contain every human’s unique genetic code. But determining how those instructions were ...