/u/RyanW1019's posts in /r/askscience

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As humans, supply our bodies with energy in the form of food, and many of us today have access to as much food as we want. Why, then, does the human body still increase in entropy and eventually break down? Why can’t we take in enough energy to reverse or halt the aging process?

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I understand that light is diffracted by water, glass, etc. because light travels slower through those materials. The part I don't understand is, why does changing the speed of light change its direction?

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Does the motion of the Earth through space alter the trajectory of light emitted on Earth? For sensitive applications, do we have to account for the Earth's movement when calculating how light will travel?

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Does every human have the exact same number of base pairs in their DNA?

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Does the Sun emit more neutrinos than photons?

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If you put a mirror on the back of a solar panel, could you make it twice as thin?

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If dark matter does not interact with regular matter except gravitationally, do stars/planets/moons accumulate dark matter at their centers?

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What are the relative proportions of bases (A,T,G,C) in DNA, and how constant are those relative proportions from person to person? From species to species?

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How do knife throwers always get the knife to hit point first?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
As humans, supply our bodies with energy in the form of food, and many of us today have access to as much food as we want. Why, then, does the human body still increase in entropy and eventually break down? Why can’t we take in enough energy to reverse or halt the aging process?	1
I understand that light is diffracted by water, glass, etc. because light travels slower through those materials. The part I don't understand is, why does changing the speed of light change its direction?	1
Does the motion of the Earth through space alter the trajectory of light emitted on Earth? For sensitive applications, do we have to account for the Earth's movement when calculating how light will travel?	1
Does every human have the exact same number of base pairs in their DNA?	1
Does the Sun emit more neutrinos than photons?	1
If you put a mirror on the back of a solar panel, could you make it twice as thin?	1
If dark matter does not interact with regular matter except gravitationally, do stars/planets/moons accumulate dark matter at their centers?	1
What are the relative proportions of bases (A,T,G,C) in DNA, and how constant are those relative proportions from person to person? From species to species?	0
How do knife throwers always get the knife to hit point first?	0