/u/bullerick's posts
So if one function of vitamin A and pro vitamins like carotenoids help with night vision, what is the limit for humans? How dark does it have to be before we cannot see in the dark anymore with our eyes?
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How far from Earth do objects have to be before they float away? And if you have two objects with different masses, will they float away at the same time? (Like when you drop them they fall at the same speed in perfect conditions)
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