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

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Has science yet been able to answer the question about whether the future is merely extremely difficult to perfectly predict because there are so many compounding variables or whether it is physically impossible to perfectly predict?

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Is there any research into the short / long term physiological or psychological effects of using VR?

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If I heated up a book to 1000 degrees Fahrenheit in a complete vacuum, what would happen? Without oxygen to oxidize it, would it still somehow be destroyed?

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Sometimes when I stare up at a ceiling fan for long enough, my brain will suddenly perceive the blades as spinning in the opposite direction for a few seconds. Why does this happen?

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If at the end of a typical human lifespan one were given a sack of all the poop they've ever pooped, how big would the sack be and how much would it weigh?

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How bring of a laser pointer would I need for an astronaut on the International Space Station to be able to notice it at night with his or her naked eye, assuming I was able to aim it right at them?

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If the sun suddenly stopped radiating (while still retaining it's mass), how long could humans survive on the Earth?

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What happens if I "hold in" a fart? Does the body re-absorb it? Is it possible for it to make its way back to the stomach so that it is released as a belch?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Has science yet been able to answer the question about whether the future is merely extremely difficult to perfectly predict because there are so many compounding variables or whether it is physically impossible to perfectly predict?	1
Is there any research into the short / long term physiological or psychological effects of using VR?	1
If I heated up a book to 1000 degrees Fahrenheit in a complete vacuum, what would happen? Without oxygen to oxidize it, would it still somehow be destroyed?	1
Sometimes when I stare up at a ceiling fan for long enough, my brain will suddenly perceive the blades as spinning in the opposite direction for a few seconds. Why does this happen?	1
If at the end of a typical human lifespan one were given a sack of all the poop they've ever pooped, how big would the sack be and how much would it weigh?	1
How bring of a laser pointer would I need for an astronaut on the International Space Station to be able to notice it at night with his or her naked eye, assuming I was able to aim it right at them?	1
If the sun suddenly stopped radiating (while still retaining it's mass), how long could humans survive on the Earth?	1
What happens if I "hold in" a fart? Does the body re-absorb it? Is it possible for it to make its way back to the stomach so that it is released as a belch?	0