Astronomers have announced the discovery of what appears to be an "ice cold Earth," a chilly but potentially habitable rocky world similar to our own located less than 150 light-years away. As ...

Astronomers have pulled a frozen, Earth-sized world out of archival data from the retired Kepler Space Telescope, revealing a planet candidate that circles its star roughly once a year and could host ...

About 700 million years ago, Earth froze over so completely that even tropical oceans turned to ice, an episode scientists call Snowball Earth. New research now points to an overlooked accomplice in ...

Iron isotopes show that salty seawater pockets beneath the ice were as cold as −15°C.

In the whole history of Earth's climate, few events are as extreme as those that geologists call "Snowball Earth." "These are times when geologic evidence indicates Earth froze over, essentially from ...

In the eastern Utah desert, carbon-dioxide-saturated water bubbles, sprays and foams from the ground. These cold-water geysers, sometimes called soda pop geysers, are a new and reliable Earth-based ...

A newly identified planet candidate, HD 137010 b, looks strikingly Earth-like in size and orbit — but it may be colder than Mars due to its dimmer star. If it has a thick enough atmosphere, though, ...