universetoday.com
Snowball Earth Probably Had Warm Spots - Universe Today
Planetary geologists propose that our planet once had periods of extreme global freezing nicknamed the “Snowball Earth” eras. During these periods, they supposed, the planet’s temperatures went so low that the oceans froze, and everything was covered in ice. Most sunlight was reflected back into space, perpetuating the icy period. But new evidence disputes this. … Continue reading "Snowball Earth Probably Had Warm Spots"