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

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From what distance would reflections off the pyramids have been visible from?

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Is it possible that there was anything in the universe prior to the Big Bang? Like, for instance, Dark Matter/Dark Energy? How can we assume Dark stuff came from the Big Bang if we don't even know what it is?

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What's the formula for the signal power RP at dist. RD of the reflection of star S (of radius SR and insolation SI at distance D) from a triangular, flat signal mirror M (with area MA and distance MD from S)?

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If mankind is responsible for the extinction of the mammoth, giant sloths, sabertooth tigers etc. from North America ~11,600 years ago, then how did we kill all the ones that were living in parts of North America where humans weren't, like remote valleys surrounded by impassable mountains & islands?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
From what distance would reflections off the pyramids have been visible from?	1
Is it possible that there was anything in the universe prior to the Big Bang? Like, for instance, Dark Matter/Dark Energy? How can we assume Dark stuff came from the Big Bang if we don't even know what it is?	1
What's the formula for the signal power RP at dist. RD of the reflection of star S (of radius SR and insolation SI at distance D) from a triangular, flat signal mirror M (with area MA and distance MD from S)?	1
If mankind is responsible for the extinction of the mammoth, giant sloths, sabertooth tigers etc. from North America ~11,600 years ago, then how did we kill all the ones that were living in parts of North America where humans weren't, like remote valleys surrounded by impassable mountains & islands?	1