› added 3 years ago
125
TIL that Pluto is so cold that it's covered in frozen Nitrogen ice. About 800,000 years ago, it may have been warm enough to have liquid Nitrogen flowing across its surface in lakes and rivers.
› added 3 years ago
125
TIL that Pluto is so cold that it's covered in frozen Nitrogen ice. About 800,000 years ago, it may have been warm enough to have liquid Nitrogen flowing across its surface in lakes and rivers.