/r/askscience

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If a transplanted organ develops cancer, can that cancer spread to the rest of the body even though it's DNA is different from the host DNA?

5411 upvotes • [deleted]

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How many average modern nuclear weapons (~1Mt) would it require to initiate a nuclear winter?

5410 upvotes • JackhusChanhus

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How can animals emerge from months long hibernation and run about without any signs of muscle degeneration?

5408 upvotes • sriharivignesh

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Is something only warm to the touch, i.e I touch with my finger, if that object is warmer than my body temperature? Or at what temp does something become warm to touch, considering when run roughly 37 C/98.6F?

5406 upvotes • Kazukaphur

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Is the earth pulled toward where the sun is now, or where the sun was 8 minutes ago?

5403 upvotes • Octillio

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In light of the recent first Marsquake recorded, what causes Marsquakes? Does Mars have tectonic plates like Earth?

5401 upvotes • tajsmum

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Is there any evidence that prehistoric man suffered from acne?

5400 upvotes • czechmate0500

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For people in areas with no access to clean water, do they live with constant parasite/bacterial infestations or do their immune systems become adept at clearing them?

5396 upvotes • MangoManchild

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I've heard that one of the purposes of the "fresh cut grass" smell is a type of distress signal that warns nearby plants to start moving nutrients to the roots before they get cut down. Is there any truth to this?

5395 upvotes • powerpuff_threesome

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What's the margin of error for atomic clocks?

5391 upvotes • redheadsoldier

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
If a transplanted organ develops cancer, can that cancer spread to the rest of the body even though it's DNA is different from the host DNA?	5411	[deleted]
How many average modern nuclear weapons (~1Mt) would it require to initiate a nuclear winter?	5410	JackhusChanhus
How can animals emerge from months long hibernation and run about without any signs of muscle degeneration?	5408	sriharivignesh
Is something only warm to the touch, i.e I touch with my finger, if that object is warmer than my body temperature? Or at what temp does something become warm to touch, considering when run roughly 37 C/98.6F?	5406	Kazukaphur
Is the earth pulled toward where the sun is now, or where the sun was 8 minutes ago?	5403	Octillio
In light of the recent first Marsquake recorded, what causes Marsquakes? Does Mars have tectonic plates like Earth?	5401	tajsmum
Is there any evidence that prehistoric man suffered from acne?	5400	czechmate0500
For people in areas with no access to clean water, do they live with constant parasite/bacterial infestations or do their immune systems become adept at clearing them?	5396	MangoManchild
I've heard that one of the purposes of the "fresh cut grass" smell is a type of distress signal that warns nearby plants to start moving nutrients to the roots before they get cut down. Is there any truth to this?	5395	powerpuff_threesome
What's the margin of error for atomic clocks?	5391	redheadsoldier