/r/askscience

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Why can't we artificially induce physical fitness?

868 upvotes • Zenquin

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Hey geologists/historians and other smart people, what is underneath all of the sand in the Sahara desert?

868 upvotes • Hcapade

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Does the amount of dark, paved surfaces humans have made have a measurable impact on local temperatures or global climate change?

868 upvotes • turquoiserabbit

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How does saline nasal spray moisturize your nose? I thought salt was used to dry things out?

868 upvotes • plantaint

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If someone is infected with SARS-COV-2 before vs. after vs. no mRNA vaccination, would their non-spike (nucleocapsid/membrane/envelope) antibody reponses be similar, or different? Would they have similar levels of said antibodies? Would those persist for a similar length of time?

868 upvotes • Any_Camel628

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Two ping pong balls.

867 upvotes • thatjeffdude79

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Are humans the only mammals to have sex in various positions?

867 upvotes • thunderkuntz

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In a binary system, could the more massive star siphon off enough mass from the smaller star that the second star would cool and become a gas giant?

867 upvotes • username-rage

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Would it be possible to build a large double slit experiment to examine the behavior of gravitational waves? If so, would that be proof that gravitons exist?

867 upvotes • metaobject

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If heat is the jiggling of particles which can't exceed the speed of light, does this mean there's an "Absolute Hot" similar to absolute zero?

866 upvotes • hitlerwasright

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why can't we artificially induce physical fitness?	868	Zenquin
Hey geologists/historians and other smart people, what is underneath all of the sand in the Sahara desert?	868	Hcapade
Does the amount of dark, paved surfaces humans have made have a measurable impact on local temperatures or global climate change?	868	turquoiserabbit
How does saline nasal spray moisturize your nose? I thought salt was used to dry things out?	868	plantaint
If someone is infected with SARS-COV-2 before vs. after vs. no mRNA vaccination, would their non-spike (nucleocapsid/membrane/envelope) antibody reponses be similar, or different? Would they have similar levels of said antibodies? Would those persist for a similar length of time?	868	Any_Camel628
Two ping pong balls.	867	thatjeffdude79
Are humans the only mammals to have sex in various positions?	867	thunderkuntz
In a binary system, could the more massive star siphon off enough mass from the smaller star that the second star would cool and become a gas giant?	867	username-rage
Would it be possible to build a large double slit experiment to examine the behavior of gravitational waves? If so, would that be proof that gravitons exist?	867	metaobject
If heat is the jiggling of particles which can't exceed the speed of light, does this mean there's an "Absolute Hot" similar to absolute zero?	866	hitlerwasright