/r/askscience

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How did we come up with the daily recommended number of calories, carbs, fats, sugars & proteins In humans?

709 upvotes • Nucleo

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Why does Tesla use an AC motor, requiring an inverter and associated efficiency loss, when Elon Musk's hope is for Teslas to ultimately be powered by solar energy (DC) that is stored in home batteries (DC)? Why not DC at the final step?

709 upvotes • iwantathink

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Does tying a knot in a rope change the maximum load that rope can hold before failure?

709 upvotes • mc2222

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If color is the non-absorption of specific wavelengths, wouldn't a 'red' laser consist of every color except red?

709 upvotes • kozmo1313

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Why do you see double when drinking or sometimes experience the situation where you need to close one eye to concentrate on written text? More specifically, what mechanisms in the brain create the situation where hemispheres of the brain might not communicate correctly in this situation?

709 upvotes • Red_Stormbringer

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What exactly causes the perception of tiredness or fatigue when having a high fever or flu?

709 upvotes • throawyE

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If lightening usually strikes the highest point, do ships out to sea get struck often?

708 upvotes • rickreflex

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Science behind fetishes

708 upvotes • QWOPtain

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Can we add extra organs to people?

708 upvotes • will_this_explode

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How did the double slit experiment explain if light was a wave or a particle?

708 upvotes • arose020

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How did we come up with the daily recommended number of calories, carbs, fats, sugars & proteins In humans?	709	Nucleo
Why does Tesla use an AC motor, requiring an inverter and associated efficiency loss, when Elon Musk's hope is for Teslas to ultimately be powered by solar energy (DC) that is stored in home batteries (DC)? Why not DC at the final step?	709	iwantathink
Does tying a knot in a rope change the maximum load that rope can hold before failure?	709	mc2222
If color is the non-absorption of specific wavelengths, wouldn't a 'red' laser consist of every color except red?	709	kozmo1313
Why do you see double when drinking or sometimes experience the situation where you need to close one eye to concentrate on written text? More specifically, what mechanisms in the brain create the situation where hemispheres of the brain might not communicate correctly in this situation?	709	Red_Stormbringer
What exactly causes the perception of tiredness or fatigue when having a high fever or flu?	709	throawyE
If lightening usually strikes the highest point, do ships out to sea get struck often?	708	rickreflex
Science behind fetishes	708	QWOPtain
Can we add extra organs to people?	708	will_this_explode
How did the double slit experiment explain if light was a wave or a particle?	708	arose020