/r/askscience

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Can two lazers that both emit light outside of the visible spectrum interfere with each other to create a visible pixel at their intersection?

2281 upvotes • foolandhismoney

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Is there a difference between microwaving food for 1 minute vs. two 30-second sessions? If so, why?

2281 upvotes • RAAAAAAAAAAGE

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How does using water irresponsibly remove it from the water cycle?

2280 upvotes • Wild_Harvest

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Is a black hole a perfect sphere or is it not due to its spinning?

2280 upvotes • DarinHristov

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Could you charge a black hole by feeding it electrons or protons?

2280 upvotes • PicometerPeter

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Why does coffee only make a stain on the mug at the level of the coffee?

2278 upvotes • Bellions

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Can a flammable gas ignite merely by increasing its temperature (without a flame)?

2278 upvotes • ExCx

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At what point, specifically referencing Earth, does Euclidean geometry turn into non-Euclidean geometry?

2277 upvotes • AntarcticanJam

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If you’re born with all your eggs at birth, why is there more risk for having kids after 30?

2277 upvotes • Beginning-Tomato1021

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Why are Marie Curie's possessions kept in lead boxes?

2276 upvotes • jns_reddit_already

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Can two lazers that both emit light outside of the visible spectrum interfere with each other to create a visible pixel at their intersection?	2281	foolandhismoney
Is there a difference between microwaving food for 1 minute vs. two 30-second sessions? If so, why?	2281	RAAAAAAAAAAGE
How does using water irresponsibly remove it from the water cycle?	2280	Wild_Harvest
Is a black hole a perfect sphere or is it not due to its spinning?	2280	DarinHristov
Could you charge a black hole by feeding it electrons or protons?	2280	PicometerPeter
Why does coffee only make a stain on the mug at the level of the coffee?	2278	Bellions
Can a flammable gas ignite merely by increasing its temperature (without a flame)?	2278	ExCx
At what point, specifically referencing Earth, does Euclidean geometry turn into non-Euclidean geometry?	2277	AntarcticanJam
If you’re born with all your eggs at birth, why is there more risk for having kids after 30?	2277	Beginning-Tomato1021
Why are Marie Curie's possessions kept in lead boxes?	2276	jns_reddit_already