/r/askscience

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Is it possible for black holes to lose their "black hole" status?

4416 upvotes • Hawksource-

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How can the sun keep on burning?

4414 upvotes • Vinceconvince

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Is there a scientific reason they ask you not to use flash on your camera when taking photos centuries old interiors or artifacts?

4412 upvotes • fugaziozbourne

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What are the properties of an ion engine exhaust? Is it warm? Is the engine loud? What would happen to stuff that gets in the way of the exhaust?

4401 upvotes • SimmeP

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At what altitude do compasses cease to work?

4397 upvotes • dr_greasy_lips

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What is the social behavior of tardigrades? Do and if so, how do tardigrades interact with one another?

4396 upvotes • Megaflarp

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How does the Higgs Boson and top quark mass help us infer the stability/metastability of the universe?

4396 upvotes • Maezel

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Can a Mars Colony be built so deep underground that it's pressure and temp is equal to Earth?

4395 upvotes • 2Mobile

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Hubble just discovered the largest comet to date. Would there be an upper limit to the size of a comet?

4394 upvotes • Kickstand8604

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Why is it not possible to simply add protons, electrons, and neutrons together to make whatever element we want?

4393 upvotes • Somethingfishy4

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Is it possible for black holes to lose their "black hole" status?	4416	Hawksource-
How can the sun keep on burning?	4414	Vinceconvince
Is there a scientific reason they ask you not to use flash on your camera when taking photos centuries old interiors or artifacts?	4412	fugaziozbourne
What are the properties of an ion engine exhaust? Is it warm? Is the engine loud? What would happen to stuff that gets in the way of the exhaust?	4401	SimmeP
At what altitude do compasses cease to work?	4397	dr_greasy_lips
What is the social behavior of tardigrades? Do and if so, how do tardigrades interact with one another?	4396	Megaflarp
How does the Higgs Boson and top quark mass help us infer the stability/metastability of the universe?	4396	Maezel
Can a Mars Colony be built so deep underground that it's pressure and temp is equal to Earth?	4395	2Mobile
Hubble just discovered the largest comet to date. Would there be an upper limit to the size of a comet?	4394	Kickstand8604
Why is it not possible to simply add protons, electrons, and neutrons together to make whatever element we want?	4393	Somethingfishy4