/r/askscience

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How do some things get absorbed through lung gas exchange (Nicotine) but others don't? (Tar)

918 upvotes • CarlTheLime

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Why do animals have bladders to hold urine?

918 upvotes • snappy033

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If an object was heated up and placed in a perfect vacuum would it stay hot forever?

917 upvotes • MetalBox1

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Can anybody tell me what is going on here? My girlfriend and I saw this from the main beach (Barceloneta) of Barcelona, Spain this past July.

917 upvotes • kingmantea

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Why does paper become transparent when it soaks up oil/fat?

916 upvotes • RedManDancing

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If Jupiter is gas giant does it have a surface that you could theoretically stand on ?

915 upvotes • themightypierre

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[Biology] Since air is only about 25% oxygen, does it really matter for humans what the rest of it is, as long as it's not toxic?

915 upvotes • el_matt

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What exactly keeps our brains 'in place,' and not from smashing into the skull all the time?

915 upvotes • ziggybadger

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If we have B-cells for every possible pathogen, why don't we have automatic immunity to everything?

915 upvotes • pussyriot94

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What happens when a bee or wasp hitches a ride in your car, then gets out of the car a long distance from home?

914 upvotes • puss_parkerswidow

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How do some things get absorbed through lung gas exchange (Nicotine) but others don't? (Tar)	918	CarlTheLime
Why do animals have bladders to hold urine?	918	snappy033
If an object was heated up and placed in a perfect vacuum would it stay hot forever?	917	MetalBox1
Can anybody tell me what is going on here? My girlfriend and I saw this from the main beach (Barceloneta) of Barcelona, Spain this past July.	917	kingmantea
Why does paper become transparent when it soaks up oil/fat?	916	RedManDancing
If Jupiter is gas giant does it have a surface that you could theoretically stand on ?	915	themightypierre
[Biology] Since air is only about 25% oxygen, does it really matter for humans what the rest of it is, as long as it's not toxic?	915	el_matt
What exactly keeps our brains 'in place,' and not from smashing into the skull all the time?	915	ziggybadger
If we have B-cells for every possible pathogen, why don't we have automatic immunity to everything?	915	pussyriot94
What happens when a bee or wasp hitches a ride in your car, then gets out of the car a long distance from home?	914	puss_parkerswidow