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

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Is it true that if there is a civilization that is 63,000,000 light years away from us, and they use a telescope and focus it on Earth, they will see dinosaurs?

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Is there a sound that can kill you?

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What would happen if 80% of the atmosphere was comprised of oxygen?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is it true that if there is a civilization that is 63,000,000 light years away from us, and they use a telescope and focus it on Earth, they will see dinosaurs?	1
Is there a sound that can kill you?	1
What would happen if 80% of the atmosphere was comprised of oxygen?	1