/r/askscience

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Only show posts with narrations

How can SmartWatches measure the blood pressure?

3588 upvotes • Capable_Resolution94

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If a caterpillar loses a leg, then goes through metamorphosis, will the butterfly be missing a part of it?

3584 upvotes • OmniscientDampe

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How finite are the resources required for solar power?

3583 upvotes • JoshuaTheGreat88

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AskScience AMA Series: I'm Dr. Kathryn Bywaters and I am an astrobiologist at SETI working on developing new ways to look for life! Ask me anything!

3583 upvotes • AskScienceModerator

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If I'm on a planet with incredibly high gravity, and thus very slow time, looking through a telescope at a planet with much lower gravity and thus faster time, would I essentially be watching that planet in fast forward? Why or why not?

3581 upvotes • UndercookedPizza

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If diamonds are the hardest material on Earth, why are they possible to break in a hydraulic press?

3581 upvotes • ObscureClarity

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Can shock waves from a major explosion exit the earth’s atmosphere? If so, what happens to them in vacuum?

3579 upvotes • turnedtable10

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When is a rock considered to be “born”?

3579 upvotes • The_Real_Mr_F

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If almonds and walnuts are, botanically speaking, seeds instead of nuts, why do they still cause a reaction in tree nut allergies?

3579 upvotes • HOWDEHPARDNER

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How do CO2 scrubbers work?

3576 upvotes • roundearthervaxxer

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How can SmartWatches measure the blood pressure?	3588	Capable_Resolution94
If a caterpillar loses a leg, then goes through metamorphosis, will the butterfly be missing a part of it?	3584	OmniscientDampe
How finite are the resources required for solar power?	3583	JoshuaTheGreat88
AskScience AMA Series: I'm Dr. Kathryn Bywaters and I am an astrobiologist at SETI working on developing new ways to look for life! Ask me anything!	3583	AskScienceModerator
If I'm on a planet with incredibly high gravity, and thus very slow time, looking through a telescope at a planet with much lower gravity and thus faster time, would I essentially be watching that planet in fast forward? Why or why not?	3581	UndercookedPizza
If diamonds are the hardest material on Earth, why are they possible to break in a hydraulic press?	3581	ObscureClarity
Can shock waves from a major explosion exit the earth’s atmosphere? If so, what happens to them in vacuum?	3579	turnedtable10
When is a rock considered to be “born”?	3579	The_Real_Mr_F
If almonds and walnuts are, botanically speaking, seeds instead of nuts, why do they still cause a reaction in tree nut allergies?	3579	HOWDEHPARDNER
How do CO2 scrubbers work?	3576	roundearthervaxxer