/r/askscience

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If photons have a minimum wavelength, what happens when photons at that energy are blue shifted?

2463 upvotes • bearjuani

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What makes a gas a greenhouse gas? For example, what are the molecular properties of carbon dioxide (CO2) that allow it to retain heat, that nitrogen (N2) lacks?

2462 upvotes • Tio76

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What is spin in Quantum Mechanics? What function does it serve in QM?

2461 upvotes • fart_smells_good

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Can you fall out of water? Let me explain.

2460 upvotes • mastrn

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All your meteorite questions

2459 upvotes • OrbitalPete

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AskScience AMA Series: We are Hispanic Americans Working in a Variety of Roles at NASA. Ask us anything!

2458 upvotes • AskScienceModerator

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Why is it that the skin on the human face is so much more sensitive and prone to problems like acne?

2457 upvotes • Wilsoncola

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How does physical manipulation (e.g. massage) relax muscles? Does pressure create physiological changes in the tissue?

2455 upvotes • superhelical

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What happens when a bruise heals?

2455 upvotes • DwagonFyre

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AskScience AMA Series: What's in your mouth? We're experts who study the oral microbiome and how it impacts your health. AUA!

2454 upvotes • AskScienceModerator

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
If photons have a minimum wavelength, what happens when photons at that energy are blue shifted?	2463	bearjuani
What makes a gas a greenhouse gas? For example, what are the molecular properties of carbon dioxide (CO2) that allow it to retain heat, that nitrogen (N2) lacks?	2462	Tio76
What is spin in Quantum Mechanics? What function does it serve in QM?	2461	fart_smells_good
Can you fall out of water? Let me explain.	2460	mastrn
All your meteorite questions	2459	OrbitalPete
AskScience AMA Series: We are Hispanic Americans Working in a Variety of Roles at NASA. Ask us anything!	2458	AskScienceModerator
Why is it that the skin on the human face is so much more sensitive and prone to problems like acne?	2457	Wilsoncola
How does physical manipulation (e.g. massage) relax muscles? Does pressure create physiological changes in the tissue?	2455	superhelical
What happens when a bruise heals?	2455	DwagonFyre
AskScience AMA Series: What's in your mouth? We're experts who study the oral microbiome and how it impacts your health. AUA!	2454	AskScienceModerator