/u/carboniferousP's posts in /r/askscience

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How saturated is Earth with life? Is there life as far as the atmosphere is high? And how far does it extend into the Earth?

1299 upvotes

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Would a compass work on Mars? If not, how does Curiosity know which way is North?

485 upvotes

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I can't figure out why this perpetual motion machine wouldn't work

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How saturated is Earth with life? Is there life as far as the atmosphere is high? And how far does it extend into the Earth?	1299
Would a compass work on Mars? If not, how does Curiosity know which way is North?	485
I can't figure out why this perpetual motion machine wouldn't work	1