Earth’s magnetic field sustains life on our planet, protecting us from solar winds, radiation and extreme changes in temperature. But around 591 million years ago, it almost collapsed.

Researchers have uncovered physical evidence indicating that Earth was entirely frozen during the “Snowball Earth” period, spanning roughly 720 to 635 million years ago. During this period ...

shielding the Earth's surface from harmful solar radiation. The first multicelled animals appeared in the fossil record almost 600 million years ago. Known as the Ediacarans, these bizarre ...

continental-size glaciers can cover enormous regions of the earth. Ever since the Pre-Cambrian (600 million years ago), ice ages have occurred at widely spaced intervals of geologic time ...

A crater at the edge of the Yucatán peninsula in Mexico was created by a massive asteroid that hit Earth 66 million years ago At the end of the Cretaceous Period 66 million years ago, an ...