About 4 billion years ago, Earth began to show signs of the conditions that allowed the first cells to take hold and populate ...

All life on Earth ... years after the planet’s formation. But a study from an international team of scientists pushes that timeline back even further to some 4.2 billion years ago, while also ...

Few topics have been as contentious among both scientists and laypeople as the age of the Earth. Many scientists ... originating some 3.4 billion years ago. Stromatolites are sedimentary ...

Tajika and his team used a numerical model to simulate key aspects of biological, geological and chemical changes during the late Archean eon (3.0–2.5 billion years ago) of Earth's geologic history.

Earth formed over 4.5 billion years ago from a swirling cloud of gas and dust squished together by gravity. That same cloud gave rise to our entire solar system, including our star, the sun.