/r/askscience

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I read that, on average, 3 supernovas will occur in the Milky Way galaxy every century. If that is the case why haven't we observed any since the last one in 1604?

5117 upvotes • PA2SK

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If, theoretically, you were in an infinite sized room, and there was complete darkness. If you lit a candle, how far away would you have to be from this candle before you couldn't see it?

5114 upvotes • 21brandon021

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Is there an anti-placebo effect as in a patient believing a treatment doesn't work reducing the effectiveness? If so, how strong is it?

5113 upvotes • spacejunk444

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How does a chameleon change color?

5112 upvotes • chiefflerpynerps

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What's the dry, papery layer inside a peanut shell and what's it for?

5112 upvotes • jeremyfrankly

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What's the deepest hole we could reasonably dig with our current level of technology? If you fell down it, how long would it take to hit the bottom?

5109 upvotes • The_Sven

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How does heat propagate in a vacuum if there are no particles for it to move through?

5106 upvotes • The_1st_Name_I_Chose

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Since dinosaurs were discovered far below the earths surface covered in dirt, how does the earth gradually pile dirt on itself, forming layers covering up history over the past few centuries?

5106 upvotes • squanto420sqanching

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How was covid in 2003 stopped?

5103 upvotes • imNOTsureABOUTjesus

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Can people with the flu or common cold be asymptomatic?

5098 upvotes • jplank1983

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
I read that, on average, 3 supernovas will occur in the Milky Way galaxy every century. If that is the case why haven't we observed any since the last one in 1604?	5117	PA2SK
If, theoretically, you were in an infinite sized room, and there was complete darkness. If you lit a candle, how far away would you have to be from this candle before you couldn't see it?	5114	21brandon021
Is there an anti-placebo effect as in a patient believing a treatment doesn't work reducing the effectiveness? If so, how strong is it?	5113	spacejunk444
How does a chameleon change color?	5112	chiefflerpynerps
What's the dry, papery layer inside a peanut shell and what's it for?	5112	jeremyfrankly
What's the deepest hole we could reasonably dig with our current level of technology? If you fell down it, how long would it take to hit the bottom?	5109	The_Sven
How does heat propagate in a vacuum if there are no particles for it to move through?	5106	The_1st_Name_I_Chose
Since dinosaurs were discovered far below the earths surface covered in dirt, how does the earth gradually pile dirt on itself, forming layers covering up history over the past few centuries?	5106	squanto420sqanching
How was covid in 2003 stopped?	5103	imNOTsureABOUTjesus
Can people with the flu or common cold be asymptomatic?	5098	jplank1983