Earth was bombarded with radiation 1.7 million years ago when a nearby star exploded: Event may have cooled the planet and even played a role in human evolution

A group at the Australian National University (ANU) found deposits containing radioactive iron isotopes in the sea beds that were shown to be from a two separate supernovae (artist’s impression). —> Read More

facebooktwittergoogle_plusredditpinterestlinkedinmail