/r/askscience

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How large would the surface of contact between two perfect spheres 1 centimeter in diameter be?

1294 upvotes • hooligan333

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I am cancer researcher Wes Wilson. I study immunotherapies, which use the immune system to treat cancer. AMA!

1294 upvotes • AskScienceModerator

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How long does HIV remain infectious outside the body?

1294 upvotes • Terradubia

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Why does cannibalism cause disease?

1293 upvotes • nbentley92

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What do roach sprays and barrier sprays actually DO to roaches to kill them?

1293 upvotes • CallThatGoing

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Why is the dark matter halo spherical?

1293 upvotes • Formyedification

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How does high humidity affect perceived temperature in hot and cold environments?

1293 upvotes • MindTheReddit

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What will happen to flight after we run out of oil?

1292 upvotes • [deleted]

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Can our ears be harmed by sounds we can't hear?

1290 upvotes • ineffable_internut

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When the Sun inevitably expands, what will happen to each planet as they are consumed?

1290 upvotes • Apophis117

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How large would the surface of contact between two perfect spheres 1 centimeter in diameter be?	1294	hooligan333
I am cancer researcher Wes Wilson. I study immunotherapies, which use the immune system to treat cancer. AMA!	1294	AskScienceModerator
How long does HIV remain infectious outside the body?	1294	Terradubia
Why does cannibalism cause disease?	1293	nbentley92
What do roach sprays and barrier sprays actually DO to roaches to kill them?	1293	CallThatGoing
Why is the dark matter halo spherical?	1293	Formyedification
How does high humidity affect perceived temperature in hot and cold environments?	1293	MindTheReddit
What will happen to flight after we run out of oil?	1292	[deleted]
Can our ears be harmed by sounds we can't hear?	1290	ineffable_internut
When the Sun inevitably expands, what will happen to each planet as they are consumed?	1290	Apophis117