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

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What happens (molecularly/biologically) when salt gets into an open wound to make it "sting?" Why does it sting?

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What happens to a photon once it enters your eye - does it get "used up?"

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We observe that the universe is expanding, and we pin it on dark matter or dark energy. What would it look like if the space between atoms is actually getting smaller (everything is shrinking) causing "us" to move further away from the outside universe? Is that a possibility? If not, why?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What happens (molecularly/biologically) when salt gets into an open wound to make it "sting?" Why does it sting?	1
What happens to a photon once it enters your eye - does it get "used up?"	1
We observe that the universe is expanding, and we pin it on dark matter or dark energy. What would it look like if the space between atoms is actually getting smaller (everything is shrinking) causing "us" to move further away from the outside universe? Is that a possibility? If not, why?	1