/r/askscience

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How is the effectiveness of the vaccines ''waning''? Does your body just forget how to fight COVID? Does Delta kill all the cells that know how to deal with it?

1666 upvotes • Pretty-Ad-1757

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Why do satellites need to thrust to maintain orbit?

1666 upvotes • benjamin051000

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Why do lysosomes need a low pH in order to function/degrade proteins?

1665 upvotes • inquilinekea

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What is the scientific consensus about the polygraph (lie detector)?

1665 upvotes • JPa258

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Has the human gestation period always been approx. 9 months through history?

1664 upvotes • omgitsjonnn

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AskScience AMA Series: We're Drs. Kerry Emanuel and Dan Cziczo, professors in MIT's Program in Atmospheres, Oceans, and Climate. We study the physics of the atmosphere and climate, and are teaching a free MOOC on Global Warming Science. Ask Us Anything!

1664 upvotes • GlobalWarmingMOOC

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If a person is hanging in mid-air, gripping a live power line with one hand on each wire, will they get electrocuted? Why or why not?

1663 upvotes • Raskreian

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If you were to put a chunk of coal at the deepest part of the ocean, would it turn into a diamond?

1663 upvotes • Goseph_

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Can spiders walk on the webs of other spider species?

1662 upvotes • TheYellowBastard

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What would happen if two black holes collided?

1662 upvotes • twmammoth

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How is the effectiveness of the vaccines ''waning''? Does your body just forget how to fight COVID? Does Delta kill all the cells that know how to deal with it?	1666	Pretty-Ad-1757
Why do satellites need to thrust to maintain orbit?	1666	benjamin051000
Why do lysosomes need a low pH in order to function/degrade proteins?	1665	inquilinekea
What is the scientific consensus about the polygraph (lie detector)?	1665	JPa258
Has the human gestation period always been approx. 9 months through history?	1664	omgitsjonnn
AskScience AMA Series: We're Drs. Kerry Emanuel and Dan Cziczo, professors in MIT's Program in Atmospheres, Oceans, and Climate. We study the physics of the atmosphere and climate, and are teaching a free MOOC on Global Warming Science. Ask Us Anything!	1664	GlobalWarmingMOOC
If a person is hanging in mid-air, gripping a live power line with one hand on each wire, will they get electrocuted? Why or why not?	1663	Raskreian
If you were to put a chunk of coal at the deepest part of the ocean, would it turn into a diamond?	1663	Goseph_
Can spiders walk on the webs of other spider species?	1662	TheYellowBastard
What would happen if two black holes collided?	1662	twmammoth