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I am a research professor who studies risky travel-related decisions and how a tourist destination responds to a crisis. AMA!

3660 upvotes • AskScienceModerator

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Why does the Human body reject transplanted organs /tissue and proceed to destroy them but it doesn't kill parasites like worms ?

3657 upvotes • Jakent10

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For People Born Without Arms/Legs, What Happens To The Brain Regions Usually Used For The Missing Limbs?

3656 upvotes • ---Giga---

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If I were to take a "frame by frame" video of a hydrogen atom and its electron, whould I find the electron moving along a trajectory or teleporting randomly throughout the cloud?

3655 upvotes • Blade2277

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Is Hurricane Matthew indicative of the end of the 11 year super quiet period of major North American hurricane activity or are conditions still generally unfavorable for hurricane formation?

3655 upvotes • sillybun99

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Why is it not E=1/2m c^2, like KE=1/2m v^2 ? Did Einstein leave off the 1/2?

3655 upvotes • dmaswhite4

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How often do animals known for their quickness or agility (like a deer or cheetah) tear ligaments or pull muscles?

3653 upvotes • jraygun13

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When a lightning bolt strikes the ground, what happens to it once the ground absorbs it?

3650 upvotes • obie_the_dachshund

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Why can the birth control “Nuvaring” be removed for up to 48 hours/month without decreasing efficacy, but “Annovera” can only be removed for 2 hours/month, even though they are both vaginal rings releasing the same hormones?

3646 upvotes • PennilessPirate

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Why is it that many cultures use the decimal system but a pattern in the names starts emerging from the number 20 instead of 10? (E.g. Twenty-one, Twenty-two, but Eleven, Twelve instead of Ten-one, Ten-two)?

3641 upvotes • NeokratosRed

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
I am a research professor who studies risky travel-related decisions and how a tourist destination responds to a crisis. AMA!	3660	AskScienceModerator
Why does the Human body reject transplanted organs /tissue and proceed to destroy them but it doesn't kill parasites like worms ?	3657	Jakent10
For People Born Without Arms/Legs, What Happens To The Brain Regions Usually Used For The Missing Limbs?	3656	---Giga---
If I were to take a "frame by frame" video of a hydrogen atom and its electron, whould I find the electron moving along a trajectory or teleporting randomly throughout the cloud?	3655	Blade2277
Is Hurricane Matthew indicative of the end of the 11 year super quiet period of major North American hurricane activity or are conditions still generally unfavorable for hurricane formation?	3655	sillybun99
Why is it not E=1/2m c^2, like KE=1/2m v^2 ? Did Einstein leave off the 1/2?	3655	dmaswhite4
How often do animals known for their quickness or agility (like a deer or cheetah) tear ligaments or pull muscles?	3653	jraygun13
When a lightning bolt strikes the ground, what happens to it once the ground absorbs it?	3650	obie_the_dachshund
Why can the birth control “Nuvaring” be removed for up to 48 hours/month without decreasing efficacy, but “Annovera” can only be removed for 2 hours/month, even though they are both vaginal rings releasing the same hormones?	3646	PennilessPirate
Why is it that many cultures use the decimal system but a pattern in the names starts emerging from the number 20 instead of 10? (E.g. Twenty-one, Twenty-two, but Eleven, Twelve instead of Ten-one, Ten-two)?	3641	NeokratosRed