Studying human evolution involves piecing together scattered clues about how we survived against tough odds. One of the ...

A growing amount of evidence is pointing to the idea that around 232 million years ago, it started to rain, and for the most ...

NASA's Curiosity Rover has discovered long carbon chains on Mars. On Earth, molecules like these are overwhelmingly produced ...

During a brief but dramatic chapter in Earth's history about 41,000 years ago, the planet’s magnetic field nearly collapsed.

B acteria, among the oldest of life forms, have lived in seemingly every possible habitat on the planet, from ocean trenches ...