/u/SlutForTurtles's posts in /r/askscience
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Why is the universe expanding if gravity from massive objects in space should be pulling everything closer?
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Theoretically, what would happen over time if every time it rained, we captured the water, bottled it in a huge bottle, and never released it back into the atmosphere?
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What would happen if your butt sealed a toilet in space? In other words, if you were sitting perfectly on a toilet when suddenly a hole appeared where the poop goes that leads to the vacuum of space, so your butt is the perfect seal between your aircraft and space.
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How different would gravity/life be on the earth if it was twice as big but weighed exactly the same?
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How far away would you need to be standing to observe light actually moving instead of just being instant?
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1) Can you really go any direction in space and continue on endlessly? 2) How is the universe expanding in all directions without having a center or starting point?
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We know light and darkness exist. Is it possible for there to be a similar 3rd "thing" that we just didn't discover yet? Or is it as simple as all matter in there universe will either sit in darkness or be exposed with light, with no other possibility.
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How do scientists actually know we don't know 95% of the universe? How do they know it's not 99% of the universe hasn't been discovered yet? And how is there any percentage involved at all if the universe is infinite?
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