Snowball Earth might have been more of a slushball, scientists say. More temperate regions with pockets of slushy waters would have allowed life to survive.
See 13 volcanoes from space in this new video from the European Space Agency. Plus, learn about the recently active volcanoes on the Kamchatka Peninsula.
A massive seaweed bloom of sargassum in the Atlantic Ocean is headed toward the Caribbean and east coast of Florida. Some locals are already seeing it.
A hybrid eclipse is a solar eclipse that appears as total for some and annular for others, with those farther from the centerline seeing a partial eclipse.
Medieval monks kept detailed nature journals, which included stories of strangely dark lunar eclipses. Today, those old journals are helping researchers pinpoint dates of past volcanic eruptions.