Almost two decades ago ... Google Earth), and Zipdash, which focused on real-time traffic analysis. Together, these three ...

Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4.5 billion years ago and ending with the emergence of complex, multicelled life-forms ...

New research suggests that Earth's first crust, formed over 4.5 billion years ago, already carried the chemical traits we ...