/r/askscience

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What exactly is an itch? What is the most common reason why we suddenly feel like we have to scratch that spot?

1109 upvotes • theHopp

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Why do we trust carbon dating?

1108 upvotes • OMGeeverghese

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How many prions are there?

1108 upvotes • 0x0BAD_ash

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Voyager 1 is almost outside of our solar system. Awesome. Relative to the Milky Way, how insignificant is this distance? How long would it take for the Voyager to reach the edge of the Milky Way?

1107 upvotes • mjmbo

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Evolution question: It said in my biology textbook that evolution never causes an individual to sacrifice their own ability to survive to increase the survivability of their group. But how do you explain poisonous mushrooms, or bees that die after losing their stinger?

1107 upvotes • NiggaWantNiggaSteal

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Humans and chimpansees diverged some 6 million years ago. This was calculated using the molecular clock. How exactly was this calculation made?

1107 upvotes • Koeny1

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A blue shirt reflects blue light, a green one reflects green light. Is it possible to make infrared shirts and would they be effective at keeping us cool in summer?

1107 upvotes • DeleteriousEuphuism

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In my high school physics class, today we learned that centrifugal force is not real and when people say this, it is actually centripetal force. How did the idea of centrifugal force get widely known and spread, more so than centripetal force, if it does not exist?

1107 upvotes • broad_h2o

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Is vaccination always recommended after infection regardless of the type of pathogen?

1107 upvotes • SportsAndScience

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Is catnip a hallucinogenic drug or a stimulant or a sedative, or another, unrelated type of drug?

1106 upvotes • DwarfJesus

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
What exactly is an itch? What is the most common reason why we suddenly feel like we have to scratch that spot?	1109	theHopp
Why do we trust carbon dating?	1108	OMGeeverghese
How many prions are there?	1108	0x0BAD_ash
Voyager 1 is almost outside of our solar system. Awesome. Relative to the Milky Way, how insignificant is this distance? How long would it take for the Voyager to reach the edge of the Milky Way?	1107	mjmbo
Evolution question: It said in my biology textbook that evolution never causes an individual to sacrifice their own ability to survive to increase the survivability of their group. But how do you explain poisonous mushrooms, or bees that die after losing their stinger?	1107	NiggaWantNiggaSteal
Humans and chimpansees diverged some 6 million years ago. This was calculated using the molecular clock. How exactly was this calculation made?	1107	Koeny1
A blue shirt reflects blue light, a green one reflects green light. Is it possible to make infrared shirts and would they be effective at keeping us cool in summer?	1107	DeleteriousEuphuism
In my high school physics class, today we learned that centrifugal force is not real and when people say this, it is actually centripetal force. How did the idea of centrifugal force get widely known and spread, more so than centripetal force, if it does not exist?	1107	broad_h2o
Is vaccination always recommended after infection regardless of the type of pathogen?	1107	SportsAndScience
Is catnip a hallucinogenic drug or a stimulant or a sedative, or another, unrelated type of drug?	1106	DwarfJesus