An artist’s rendition of what a snowball planet might look like. Ice covers the oceans to the equators. NASA Astronomers have long assumed that, in order to be habitable, an exoplanet should be a ...

Researchers have discovered the Earth's oldest asteroid impact crater, a 2.2 billion-year-old strike found in Western Australia. The space rock may have also ended a massive ice age that radically ...

Researchers have discovered a massive ice age more than 600 million years ago radically altered the planet's climate, resulting in a "Snowball Earth." The study, published last month, notes that the ...

A new University of Toronto study is challenging the definition of what makes a planet hospitable to life, finding that “snowball” planets may harbour the necessary conditions. “When we think of a ...