/r/askscience

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Introducing: AskScience Quarterly, a new popular science magazine by the scientists of reddit!

4470 upvotes • AsAChemicalEngineer

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With many devices today using Lithium to power them, how much Li is left in the earth?

4470 upvotes • xshana414

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Why can I see my LED lightbulbs flicker when I see them in my periphery, but not directly?

4468 upvotes • King_Hank_Hill

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When did "sleeping" evolve? What are the most primitive organisms that we know of that sleep?

4462 upvotes • gargoyle_mayonnaise

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When you have antibodies for COVID, do repeated exposures to sources of the virus "refresh" the timer on your immunity?

4462 upvotes • Argionelite

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What is the earliest event there is evidence of cultural memory for?

4460 upvotes • AppHelper

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Can any Bee larva become a queen?

4458 upvotes • Accurate_Ambassador

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How do centipedes/millipedes control all of their legs? Is there some kind of simple pattern they use, or does it take a lot of brainpower?

4453 upvotes • CrazyKirby97

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When can we expect COVID-19 trials for children? What criteria will be used to determine effectiveness and safety? Why are children being put in trials last?

4452 upvotes • scifilove

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If someone asks me 'how many apples are on the table', and I say 'five', am I counting them quickly in my head or do I remember what five apples look like?

4451 upvotes • rroach

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Introducing: AskScience Quarterly, a new popular science magazine by the scientists of reddit!	4470	AsAChemicalEngineer
With many devices today using Lithium to power them, how much Li is left in the earth?	4470	xshana414
Why can I see my LED lightbulbs flicker when I see them in my periphery, but not directly?	4468	King_Hank_Hill
When did "sleeping" evolve? What are the most primitive organisms that we know of that sleep?	4462	gargoyle_mayonnaise
When you have antibodies for COVID, do repeated exposures to sources of the virus "refresh" the timer on your immunity?	4462	Argionelite
What is the earliest event there is evidence of cultural memory for?	4460	AppHelper
Can any Bee larva become a queen?	4458	Accurate_Ambassador
How do centipedes/millipedes control all of their legs? Is there some kind of simple pattern they use, or does it take a lot of brainpower?	4453	CrazyKirby97
When can we expect COVID-19 trials for children? What criteria will be used to determine effectiveness and safety? Why are children being put in trials last?	4452	scifilove
If someone asks me 'how many apples are on the table', and I say 'five', am I counting them quickly in my head or do I remember what five apples look like?	4451	rroach