Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. The Snowball Earth hypothesis is still debated among ...

The idea that the Earth was encased in ice some 650 million years ago has sparked much scientific debate in recent years. In the ongoing Snowball Earth “fight,” scientists continually uncover and ...

Around 700 million years ago, the Earth cooled so much that scientists believe massive ice sheets encased the entire planet like a giant snowball. This global deep freeze, known as Snowball Earth, ...

Asteroid impacts at key moments in the Earth's past could have set off global freezes that covered the entire planet in ice for thousands or even millions of years. This is the conclusion of a study ...

Stephen Warren has made eight previous trips to Antarctica, including hunkering down for a winter at South Pole, to study its climate. But on his ninth visit to the frozen continent later this year, ...

The drop stones in the tropical rocks were among the first clues that something strange once happened to planet Earth. Drop stones are rocks that land on the seabed, sometimes with so much force that ...

Add Yahoo as a preferred source to see more of our stories on Google. Rocks can hold clues to history dating back hundreds of millions of years. Christine S. Siddoway Around 700 million years ago, the ...