‘Earth’s surface has been continuously habitable since about 3.5billion years ago, but Mars’ surface evolved from more ...

A 4.4-billion-year-old zircon crystal discovered in Australia may be the oldest surviving piece of Earth.

Busting myths; how a drop of water changed a girl’s life; a tribe’s respect for fishes; and more: picks from columnist.

The rotating model, which does not break any known law of physics, suggests the universe could spin around once every 500 billion years. This would be far too slowly to detect easily, but enough to ...

‘Mammothpox’ is the name of a fictional virus that the World Health Organization (WHO) used to test how prepared 15 countries ...