About 99% of Earth is uninhabitable; in deep underground places with high pressure and temperature, even the toughest ...
1hon MSN
There might be a type of exoplanet without dry land. They're called "Hycean" worlds, a portmanteau of "hydrogen" and "ocean." ...
The northern plains of Mars, marked by thousands of mounds and hills, hold significant evidence of the planet's watery past.
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