/r/askscience

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Why didn't the leak in the ISS vent all the air immediately?

5937 upvotes • Irish_Potatoes_

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Is urine really sterile?

5935 upvotes • WeatherWolf31

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Why did all marine mammals evolve to have horizontal tail fins while all(?) fish evolve to have vertical ones?

5932 upvotes • LT_DANS_ICECREAM

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Do satellites, like the Hubble Telescope, get dirty?

5927 upvotes • Raiderboy105

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Why do white arctic animals have black noses?

5926 upvotes • candrade2261

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How does Mad Cow Disease stay dormant for upto decades in humans? How have we still not eliminated the disease?

5926 upvotes • sparsh26

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Noob Question about virus, Why there is no vaccine for HIV or any sexually transmitted disease?

5921 upvotes • paxtecum8

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Do COVID tests actually take 24 hours to process or are facilities just swamped?

5915 upvotes • alexnpark

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Nitroglycerine is an explosive. Nitroglycerine is also a medicine. How does the medicinal nitroglycerine not explode when swallowing or chewing?

5908 upvotes • pm_boobs_send_nudes

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How does something as temporary as a human footprint get preserved for more than 10,000 years?

5904 upvotes • flubbergrubbery

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why didn't the leak in the ISS vent all the air immediately?	5937	Irish_Potatoes_
Is urine really sterile?	5935	WeatherWolf31
Why did all marine mammals evolve to have horizontal tail fins while all(?) fish evolve to have vertical ones?	5932	LT_DANS_ICECREAM
Do satellites, like the Hubble Telescope, get dirty?	5927	Raiderboy105
Why do white arctic animals have black noses?	5926	candrade2261
How does Mad Cow Disease stay dormant for upto decades in humans? How have we still not eliminated the disease?	5926	sparsh26
Noob Question about virus, Why there is no vaccine for HIV or any sexually transmitted disease?	5921	paxtecum8
Do COVID tests actually take 24 hours to process or are facilities just swamped?	5915	alexnpark
Nitroglycerine is an explosive. Nitroglycerine is also a medicine. How does the medicinal nitroglycerine not explode when swallowing or chewing?	5908	pm_boobs_send_nudes
How does something as temporary as a human footprint get preserved for more than 10,000 years?	5904	flubbergrubbery