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Simba
  • Member for 8 years
  • Last seen more than 5 years ago
13 votes
7 answers
3k views

Maximum habitability of a planet with no indigenous life

8 votes
4 answers
2k views

Vanishing oxygen

7 votes
4 answers
823 views

Major impact on the Moon

4 votes
3 answers
482 views

Warming up Mars

2 votes
1 answer
284 views

Igniting Jupiter [duplicate]