How did Earth, alone among the solar system's rocky planets, become the home for life? How, among all this frigid ...

The lush, tropical regions of Central and South America have long dazzled scientists with their plant diversity. These ...

5 fun facts about evolution The last common ancestor of all life on Earth is estimated to have existed around 4.2 billion ...

Ancient humans in Africa changed their behaviour in a major way 70,000 years ago, which could explain how their descendants ...