/r/askscience

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Does a magnet ever lose its power?

5832 upvotes • PM_NUDES_AND_FEET

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Why is it if we stare at a bright light for too long we can still see a bright outline of said light when we close our eyes?

5825 upvotes • CwenchinglyMcquaffen

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Discussion: Veritasium's newest YouTube video on simulating quantum mechanics with oil droplets!

5820 upvotes • AskScienceModerator

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How close does an electron and a positron need to approach to be able to annihilate?

5815 upvotes • lenic24

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Golf balls are said to be dimpled to reduce drag. If that’s true, why aren’t aeroplanes dimpled?

5815 upvotes • Dandandan12345

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What is "foaming at the mouth" and what exactly causes it?

5814 upvotes • GigaHunter93

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If the coronavirus (sars-cov-2) spreads through aerosols flying out of people's nose/mouth, why do we need a sample from deep inside the nose to detect it instead of just taking a saliva/snot sample from people?

5812 upvotes • NinnaHori

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Before Fleming's accidental discovery of penicillin in 1928, was bread mold a "folk remedy" for treating wounds at home?

5810 upvotes • random_hexadecimal

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Why do some vaccines require a booster shot a few weeks later after the first one?

5809 upvotes • TheOnly0neLeft

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AskScience AMA Series: I'm Dr. Paul Knoepfler, stem cell and CRISPR researcher, here to talk about how you might build a real, fire-breathing dragon. AMA!

5806 upvotes • AskScienceModerator

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Does a magnet ever lose its power?	5832	PM_NUDES_AND_FEET
Why is it if we stare at a bright light for too long we can still see a bright outline of said light when we close our eyes?	5825	CwenchinglyMcquaffen
Discussion: Veritasium's newest YouTube video on simulating quantum mechanics with oil droplets!	5820	AskScienceModerator
How close does an electron and a positron need to approach to be able to annihilate?	5815	lenic24
Golf balls are said to be dimpled to reduce drag. If that’s true, why aren’t aeroplanes dimpled?	5815	Dandandan12345
What is "foaming at the mouth" and what exactly causes it?	5814	GigaHunter93
If the coronavirus (sars-cov-2) spreads through aerosols flying out of people's nose/mouth, why do we need a sample from deep inside the nose to detect it instead of just taking a saliva/snot sample from people?	5812	NinnaHori
Before Fleming's accidental discovery of penicillin in 1928, was bread mold a "folk remedy" for treating wounds at home?	5810	random_hexadecimal
Why do some vaccines require a booster shot a few weeks later after the first one?	5809	TheOnly0neLeft
AskScience AMA Series: I'm Dr. Paul Knoepfler, stem cell and CRISPR researcher, here to talk about how you might build a real, fire-breathing dragon. AMA!	5806	AskScienceModerator