The Grand Canyon is a gigantic geological library, with rocky layers that tell much of the story of Earth’s history.

For more than half a billion years, a giant magnetic anomaly buried in Earth’s ancient rocks has puzzled scientists. The ...

Scientists have traced the origins of complex life to the breakup of the supercontinent Nuna 1.5 billion years ago. This ...

Scientists have discovered the oldest directly dated ice and air on Earth in East Antarctica, dating back six million years.