Habitability
Science
Could Life Survive on Frigid Exo-Earths? Maybe Under Ice Sheets
Our understanding of habitability relies entirely on the availability of liquid water. All life on Earth needs it,...
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Science
What’s the Best Mix of Oceans to Land for a Habitable Planet?
Earth is about 29% land and 71% oceans. How significant is that mix for habitability? What does it...
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Science
Curiosity Arrives in a Salty Region of Mars. Was it Left Over From a Dying Sea?
The Curiosity rover has now reached its primary target on Mount Sharp on Mars, the mountain in the middle...
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Science
If Earth Were an Exoplanet, it Would Still be Tricky to Figure Out if There’s Life Here
How would Earth appear to alien astronomers? What would their observations tell them about Earth if they were searching...
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Science
Water Worlds Could Have Plumes of Nutrients Carried up From Down Below
Earth’s oceans are one huge, uniform electrolyte solution. They contain salt (sodium chloride) and other nutrients like magnesium,...
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