/r/askscience

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If I'm standing 10ft from a mirror, is it the same as my eyes looking 20ft away or just the 10?

656 upvotes • kenman125

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Do humans have a lot of genetic diversity compared to other species?

656 upvotes • Flat_Pass7238

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How do sugar substitutes like sucralose affect blood insulin levels?

655 upvotes • bravery_bravery

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My debit card is dying, and the grocery store clerk revitalized it by putting it in a plastic bag before sliding it. What effect makes this work?

654 upvotes • Khrrck

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When you drop a rock into a pool of water, what determines the wavelength of the ripples created?

654 upvotes • eltommonator

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When you look up at the night sky at you see a single star, how many photons are entering your eye so that you can see that one star?

654 upvotes • Celestor

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I just finished reading Stephen Hawking's 1988 book, A Brief History of Time. What has changed since then?

653 upvotes • your_dickless_cousin

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How do people solve a rubik's cube blindfolded? Do they actually memorize the location of every piece?

653 upvotes • ahhhhhdangit

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What is the difference between a real and virtual particle, and why does that difference matter?

653 upvotes • asteconn

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Is it possible for earth to be wiped out by something from space that is so distant we can't detect it but moves so quickly that it could destroy us before we knew about it?

652 upvotes • Reddevil313

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
If I'm standing 10ft from a mirror, is it the same as my eyes looking 20ft away or just the 10?	656	kenman125
Do humans have a lot of genetic diversity compared to other species?	656	Flat_Pass7238
How do sugar substitutes like sucralose affect blood insulin levels?	655	bravery_bravery
My debit card is dying, and the grocery store clerk revitalized it by putting it in a plastic bag before sliding it. What effect makes this work?	654	Khrrck
When you drop a rock into a pool of water, what determines the wavelength of the ripples created?	654	eltommonator
When you look up at the night sky at you see a single star, how many photons are entering your eye so that you can see that one star?	654	Celestor
I just finished reading Stephen Hawking's 1988 book, A Brief History of Time. What has changed since then?	653	your_dickless_cousin
How do people solve a rubik's cube blindfolded? Do they actually memorize the location of every piece?	653	ahhhhhdangit
What is the difference between a real and virtual particle, and why does that difference matter?	653	asteconn
Is it possible for earth to be wiped out by something from space that is so distant we can't detect it but moves so quickly that it could destroy us before we knew about it?	652	Reddevil313