/r/askscience

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Is there a limit to how high birds can fly? What's the determining factor?

1449 upvotes • dd_de_b

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Does sunscreen block the synthesis of both vitamin D and β-endorphin in the skin when out in the sun?

1449 upvotes • Mercurycandie

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Are swimming pools breeding chlorine-resistant organisms?

1448 upvotes • DonQuixBalls

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Why is it that the majority of humans are right handed?

1448 upvotes • [deleted]

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Can the water pressure from a fire hose stop a bullet?

1447 upvotes • GodlessMe

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Is there any chance the asteroid belt in our solar system could coalesce and form a planet?

1447 upvotes • sirandytaylor

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Putting sponges in a blender. How do they know to separate out again?

1446 upvotes • ninjamokturtle

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If I draft behind an 18-wheeler on the freeway to improve my MPG, does Conservation of Energy mean I'm actually making him less efficient (lower MPG)? Why or why not?

1446 upvotes • 3xperience

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Given feeding someone a sugar pill and telling them it's medicine can improve health, if you gave someone a sugar pill and told them it's poison, would it sicken them?

1445 upvotes • neva4get

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Is it possible for a moon to have a moon?

1445 upvotes • chewbacca_says

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Is there a limit to how high birds can fly? What's the determining factor?	1449	dd_de_b
Does sunscreen block the synthesis of both vitamin D and β-endorphin in the skin when out in the sun?	1449	Mercurycandie
Are swimming pools breeding chlorine-resistant organisms?	1448	DonQuixBalls
Why is it that the majority of humans are right handed?	1448	[deleted]
Can the water pressure from a fire hose stop a bullet?	1447	GodlessMe
Is there any chance the asteroid belt in our solar system could coalesce and form a planet?	1447	sirandytaylor
Putting sponges in a blender. How do they know to separate out again?	1446	ninjamokturtle
If I draft behind an 18-wheeler on the freeway to improve my MPG, does Conservation of Energy mean I'm actually making him less efficient (lower MPG)? Why or why not?	1446	3xperience
Given feeding someone a sugar pill and telling them it's medicine can improve health, if you gave someone a sugar pill and told them it's poison, would it sicken them?	1445	neva4get
Is it possible for a moon to have a moon?	1445	chewbacca_says