/r/askscience

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How far underwater could you breath using a hose or pipe (at 1 atmosphere) before the pressure becomes too much for your lungs to handle?

3744 upvotes • Acode90

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What would happen if sea levels DROPPED?

3744 upvotes • blaertes

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Why are the overwhelming majority of skeletal systems calcium based instead of some other mineral? Is there any record of organisms with different mineral based exoskeletons?

3742 upvotes • blyat1902

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Why does rust not occur on stainless steel?

3740 upvotes • 17kgCarrots

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Since DNA is an acid, is there such thing as DNA salts?

3739 upvotes • CreativeArbok

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What Earth microorganisms, if any, would thrive on Mars?

3739 upvotes • Sarlax

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Why can CTE only be diagnosed by autopsy, and is there a chance this could change anytime soon?

3739 upvotes • ChalkDstTorture

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Would drinking "heavy water" (Deuterium oxide) be harmful to humans? What would happen different compared to H20?

3738 upvotes • Snowodin

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Why can't the immune system create antibodies that target the rabies virus?

3734 upvotes • jla-

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Why does color fade when left in sunlight for extended periods of time?

3732 upvotes • Q101dabaws

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How far underwater could you breath using a hose or pipe (at 1 atmosphere) before the pressure becomes too much for your lungs to handle?	3744	Acode90
What would happen if sea levels DROPPED?	3744	blaertes
Why are the overwhelming majority of skeletal systems calcium based instead of some other mineral? Is there any record of organisms with different mineral based exoskeletons?	3742	blyat1902
Why does rust not occur on stainless steel?	3740	17kgCarrots
Since DNA is an acid, is there such thing as DNA salts?	3739	CreativeArbok
What Earth microorganisms, if any, would thrive on Mars?	3739	Sarlax
Why can CTE only be diagnosed by autopsy, and is there a chance this could change anytime soon?	3739	ChalkDstTorture
Would drinking "heavy water" (Deuterium oxide) be harmful to humans? What would happen different compared to H20?	3738	Snowodin
Why can't the immune system create antibodies that target the rabies virus?	3734	jla-
Why does color fade when left in sunlight for extended periods of time?	3732	Q101dabaws