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

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Is there a limit to how large life-sustaining a planet can be?

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How much would the natural production of Co2 have to fluctuate to offset that which is made by man?

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How powerful would an explosion on the moon have to be to destabilize its orbit enough to cause it to crash into earth?

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How do we really know when the big bang happened -- if we cannot observe the entire universe?

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On average, how many humans are in space at any given time?

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Is it possible to turn radiation into fuel?

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If the ice melted over Antarctica, would the earth be at risk of an extinction event due to a sudden release of methane and/or C02?

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How would two people perceive it if they passed each other at half the speed of light?

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If the dark ages of the universe were shorter (so the first stars could form earlier), would that increase the likelihood of extraterrestrial intelligent life?

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Why do rockets have to launch from a vertical standstill against gravity?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is there a limit to how large life-sustaining a planet can be?	1
How much would the natural production of Co2 have to fluctuate to offset that which is made by man?	1
How powerful would an explosion on the moon have to be to destabilize its orbit enough to cause it to crash into earth?	1
How do we really know when the big bang happened -- if we cannot observe the entire universe?	1
On average, how many humans are in space at any given time?	1
Is it possible to turn radiation into fuel?	1
If the ice melted over Antarctica, would the earth be at risk of an extinction event due to a sudden release of methane and/or C02?	1
How would two people perceive it if they passed each other at half the speed of light?	1
If the dark ages of the universe were shorter (so the first stars could form earlier), would that increase the likelihood of extraterrestrial intelligent life?	1
Why do rockets have to launch from a vertical standstill against gravity?	1