Imagine stepping back in time to Earth 2 billion years ago,long before forests, dinosaurs, or even fish. Step into Earth’s ...

When a meteorite with the mass of four Mount Everests hit Earth 3.2 billion years ago, it caused global chaos and provided an unexpected silver lining for life.

When a meteorite with the mass of four Mount Everests hit Earth 3.2 billion years ago, it caused global chaos and provided an unexpected silver lining for life.

Past studies have found evidence that a robust water cycle, one that involved rain and evaporation from the land back to the atmosphere and then rain again, existed by at least 3.2 billion years ago.

Geologists modeled the last billion years of Earth's ... The land mass that ... The Ma at the top of the video stands for mega-annum or 1 million years, so 1,000 Ma is 1 billion years ago.

Earth’s marine species, especially those at the tropics, were in trouble again about 419 million to 365 million years ago. This series of mass extinctions during the Devonian period eventually ...

Mass die-off half a billion years ago caused by shifting tectonic plates, ... which formed between 600 million and 540 million years ago, ... As the mountains popped up on land, ...

2% of Earth's Mass May Be Debris From the Massive Collision That Formed the Moon. 4.5 billion years ago, Earth experienced a cataclysmic rendezvous with an ancient planet named Theia.

A massive space rock, estimated to be the size of four Mount Everests, slammed into Earth more than 3 billion years ago — and the impact could have been unexpectedly beneficial for the earliest forms ...

When a meteorite with the mass of four Mount Everests hit Earth 3.2 billion years ago, it caused global chaos and provided an unexpected silver lining for life.

(CNN) — A massive space rock, estimated to be the size of four Mount Everests, slammed into Earth more than 3 billion years ago — and the impact could have been unexpectedly beneficial for the ...

When a meteorite with the mass of four Mount Everests hit Earth 3.2 billion years ago, it caused global chaos and provided an unexpected silver lining for life.