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

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If I trapped a photon within a mirror sphere(mirrored on the inside), would it bounce around forever?

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Assuming reasonable cleanliness, how safe is it to drink toilet water?

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What causes farts?

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How does blood know when to coagulate?

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What would happen to a human if all the flora in their body died?

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If we could somehow magically shrink down to the molecular level, what would we see and feel? What about the atomic and sub-atomic levels?

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Given that the extinction of the dinosaurs paved the way for mammals to flourish and subsequently humans to flourish, if we were to discover life on another planet would a similar scenario be required there for the existence of intelligent life?

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If our hands were the size of an atom, and we held an atom or touched it with our fingers, what would it look and feel like?

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A thought experiment on FTL travel.

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[Serious question]Why am I so gassy after a night of heavy drinking?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If I trapped a photon within a mirror sphere(mirrored on the inside), would it bounce around forever?	1
Assuming reasonable cleanliness, how safe is it to drink toilet water?	1
What causes farts?	1
How does blood know when to coagulate?	1
What would happen to a human if all the flora in their body died?	1
If we could somehow magically shrink down to the molecular level, what would we see and feel? What about the atomic and sub-atomic levels?	1
Given that the extinction of the dinosaurs paved the way for mammals to flourish and subsequently humans to flourish, if we were to discover life on another planet would a similar scenario be required there for the existence of intelligent life?	1
If our hands were the size of an atom, and we held an atom or touched it with our fingers, what would it look and feel like?	1
A thought experiment on FTL travel.	1
[Serious question]Why am I so gassy after a night of heavy drinking?	1