/u/Newt24's posts in /r/askscience

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What purpose do fingerprints serve in terms of evolution? Why did we evolve with fingerprints?

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Are hotter things always less dense? I know that hot air rises because it becomes a little less dense, but is there anything that gets more dense as its temperature increases?

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[astronomy] If the Kessler Effect is soon to become a real issue, what are our best, legitimate options for dealing with it?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What purpose do fingerprints serve in terms of evolution? Why did we evolve with fingerprints?	1
Are hotter things always less dense? I know that hot air rises because it becomes a little less dense, but is there anything that gets more dense as its temperature increases?	1
[astronomy] If the Kessler Effect is soon to become a real issue, what are our best, legitimate options for dealing with it?	1