/u/lukin187250's posts in /r/askscience

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Why did the itch/scratch reflex evolve to often make the act of scratching feel good? Often you're only making the problem worse (like poison ivy). Why did it not evolve to keep you from scratching?

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If Ebola is spread through direct fluid contact and thus "difficult" to spread, why are aid workers and nurses/doctors contracting it?

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If I could perfectly suspend a helium balloon in the cabin of a jet airliner would it eventually start moving toward the back of the jet?

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If a human attempts to mimic an animal's sound (such as barking at a dog or meowing at a cat) are there any animals that would perceive we're attempting to mimic them? If so, is it actually possible to essentially "say" something to them?

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How Differently might a population of large mammals evolve over a period of 100,000 years?

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How much would space travel for all purposes be impacted in the next 10-30 years if the issue of thrust v weight was subject to a sudden and drastic breakthrough?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why did the itch/scratch reflex evolve to often make the act of scratching feel good? Often you're only making the problem worse (like poison ivy). Why did it not evolve to keep you from scratching?	2
If Ebola is spread through direct fluid contact and thus "difficult" to spread, why are aid workers and nurses/doctors contracting it?	1
If I could perfectly suspend a helium balloon in the cabin of a jet airliner would it eventually start moving toward the back of the jet?	1
If a human attempts to mimic an animal's sound (such as barking at a dog or meowing at a cat) are there any animals that would perceive we're attempting to mimic them? If so, is it actually possible to essentially "say" something to them?	1
How Differently might a population of large mammals evolve over a period of 100,000 years?	1
How much would space travel for all purposes be impacted in the next 10-30 years if the issue of thrust v weight was subject to a sudden and drastic breakthrough?	1