/r/askscience

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[Biology]Can all animals with livers process alcohol? Do all liver's function the same across species or is there variations on what can be processed and to what degree?

3887 upvotes • Tal21021

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What is actually happening when an image is out of focus and how do lenses focus them?

3887 upvotes • 14051

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Does a supermassive black hole exist before a galaxy aggregates, and serve as an attractor to create the galaxy, or does the supermassive black hole aggregate because of the existing galaxy?

3886 upvotes • traverlaw

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If you were to drive in a car at the same speed as a bullet and shoot backwards, would the bullet hang in mid-air? If so, how long?

3885 upvotes • TomatoTickler

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What happens to a fuel reservoir once it is empty?

3883 upvotes • JLaws23

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Why can I see star clusters better when they’re in my peripheral vision?

3881 upvotes • catbearcarseat

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Do both kidneys have the same chance of forming kidney stones?

3881 upvotes • Lbbrock

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AskScience AMA Series: I'm Max Welling, a research chair in Machine Learning at University of Amsterdam and VP of Technology at Qualcomm. I've over 200 scientific publications in machine learning, computer vision, statistics and physics. I'm currently researching energy efficient AI. AMA!

3880 upvotes • AskScienceModerator

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Why does putting salt water (saline) into our blood stream rehydrate us, but drinking salt water can harm us?

3878 upvotes • RangeRedneck

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If water has a boiling point of ~100 degrees C, why does it evaporate at room temperature?

3878 upvotes • mrgreencannabis

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
[Biology]Can all animals with livers process alcohol? Do all liver's function the same across species or is there variations on what can be processed and to what degree?	3887	Tal21021
What is actually happening when an image is out of focus and how do lenses focus them?	3887	14051
Does a supermassive black hole exist before a galaxy aggregates, and serve as an attractor to create the galaxy, or does the supermassive black hole aggregate because of the existing galaxy?	3886	traverlaw
If you were to drive in a car at the same speed as a bullet and shoot backwards, would the bullet hang in mid-air? If so, how long?	3885	TomatoTickler
What happens to a fuel reservoir once it is empty?	3883	JLaws23
Why can I see star clusters better when they’re in my peripheral vision?	3881	catbearcarseat
Do both kidneys have the same chance of forming kidney stones?	3881	Lbbrock
AskScience AMA Series: I'm Max Welling, a research chair in Machine Learning at University of Amsterdam and VP of Technology at Qualcomm. I've over 200 scientific publications in machine learning, computer vision, statistics and physics. I'm currently researching energy efficient AI. AMA!	3880	AskScienceModerator
Why does putting salt water (saline) into our blood stream rehydrate us, but drinking salt water can harm us?	3878	RangeRedneck
If water has a boiling point of ~100 degrees C, why does it evaporate at room temperature?	3878	mrgreencannabis