/r/askscience

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Only show posts with narrations

Why can't you refuel while the engine is running?

3920 upvotes • nickoskal024

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My toothpaste contains something called "liquid calcium". What is liquid calcium?

3917 upvotes • [deleted]

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Can you cross the beams of a uv laser and an infrared laser to make visible light?

3917 upvotes • SKRuBAUL

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When metal gets very hot, it turns, red, then orange, then yellow, then blue, then white. Why does it skip green and violet?

3917 upvotes • fevertronic

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AskScience AMA Series: I’m Dr. Julia Shaw, a memory scientist and criminal psychologist. I study how we create complex false memories. AMA!

3914 upvotes • Dr_Julia_Shaw

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Why does it take 2 weeks for the Covid vaccine to take effect? Would immune-suppressing drugs affect vaccine effectiveness if taken during these two weeks?

3913 upvotes • PRODUCTIVEstoner94

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Why do sharks and other fish have nostrils?

3912 upvotes • lantech

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Would a person submerged in a tub of water, unable to drink, survive longer than a person out of water, also unable to drink?

3910 upvotes • jdlc700

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If you drop your a phone or something else with a glass screen and the screen doesn't crack, does it have a higher chance of shattering the next time you drop it?

3905 upvotes • wtricht

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Does silver turn instantly black when exposed to hydrogen sulfide gas?

3904 upvotes • TheWatermelonGuy

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why can't you refuel while the engine is running?	3920	nickoskal024
My toothpaste contains something called "liquid calcium". What is liquid calcium?	3917	[deleted]
Can you cross the beams of a uv laser and an infrared laser to make visible light?	3917	SKRuBAUL
When metal gets very hot, it turns, red, then orange, then yellow, then blue, then white. Why does it skip green and violet?	3917	fevertronic
AskScience AMA Series: I’m Dr. Julia Shaw, a memory scientist and criminal psychologist. I study how we create complex false memories. AMA!	3914	Dr_Julia_Shaw
Why does it take 2 weeks for the Covid vaccine to take effect? Would immune-suppressing drugs affect vaccine effectiveness if taken during these two weeks?	3913	PRODUCTIVEstoner94
Why do sharks and other fish have nostrils?	3912	lantech
Would a person submerged in a tub of water, unable to drink, survive longer than a person out of water, also unable to drink?	3910	jdlc700
If you drop your a phone or something else with a glass screen and the screen doesn't crack, does it have a higher chance of shattering the next time you drop it?	3905	wtricht
Does silver turn instantly black when exposed to hydrogen sulfide gas?	3904	TheWatermelonGuy