Scientists believed that the first complex life on Earth formed 635 million years ago, but new evidence suggested otherwise. It pushed back the origins of life to 2.1 billion years ago, 1.5 ...

One of the oldest meteorites ever discovered, the 4.6 billion-year-old Erg Chech 002, could reveal vital information about the formation of the solar system.

It's no simple task to determine precisely how old Earth is. Instead, it requires delving back through time by examining ancient rocks.