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

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So human beings have tested 2,153 nuclear bombs in the last 75 years - but I was under the impression that that many bombs set off at once would basically end the species - what has been the long term effects of all that testing on the world at large?

3260 upvotes

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Is it true that water is the only substance on earth that expands when frozen?

251 upvotes

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What do antihistamines do? Why do some induce drowsiness and others not?

17 upvotes

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How much energy does it take to seperate two atoms from each other - say, for example, how much energy would it take, assuming we could grab ahold of each individual atom, to seperate my fingernail into its respective atomic particles?

5 upvotes

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How quickly would one die if one fell into molten lava? (Re: Japanese Volcano Suicide)

4 upvotes

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Those black balls they use in the LA resevoir - aren't they going to leech chemicals into the water?

3 upvotes

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If I had a mile long rope pulled taut between two people, would a strong pull by one holder of the rope be felt instantaneously by the other holder?

3 upvotes

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Hypothetical H7N9 Vaccine

2 upvotes

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Question One: Is it true sperm whale's have the largest brains on earth?

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If the 2nd Death Star exploded while orbitting the earth, as depicted in RoTJ, how would it effect earth (both gravitationally and in terms of explosive force)?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
So human beings have tested 2,153 nuclear bombs in the last 75 years - but I was under the impression that that many bombs set off at once would basically end the species - what has been the long term effects of all that testing on the world at large?	3260
Is it true that water is the only substance on earth that expands when frozen?	251
What do antihistamines do? Why do some induce drowsiness and others not?	17
How much energy does it take to seperate two atoms from each other - say, for example, how much energy would it take, assuming we could grab ahold of each individual atom, to seperate my fingernail into its respective atomic particles?	5
How quickly would one die if one fell into molten lava? (Re: Japanese Volcano Suicide)	4
Those black balls they use in the LA resevoir - aren't they going to leech chemicals into the water?	3
If I had a mile long rope pulled taut between two people, would a strong pull by one holder of the rope be felt instantaneously by the other holder?	3
Hypothetical H7N9 Vaccine	2
Question One: Is it true sperm whale's have the largest brains on earth?	2
If the 2nd Death Star exploded while orbitting the earth, as depicted in RoTJ, how would it effect earth (both gravitationally and in terms of explosive force)?	1