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

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How long do supernovas last?

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Do we know how many astronomical objects disappear into the unobservable universe?

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How long after the Chicxulub impact did the dinosaurs officially go extinct?

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Can an object have "negative" density?

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Which animals wouldn't benefit from humanity going extinct?

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Why do cats stare at walls?

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Does it matter if you brush your teeth before or after you eat? If so, why?

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Could an impact or volcanic eruption put enough debris in the atmosphere to cool down the Earth while keeping it livable?

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Is the Universe infinite AND expanding, or is it expanding at such a rate that it might as well be?

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Is it possible Earth has some sort of silicon-based life?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How long do supernovas last?	1
Do we know how many astronomical objects disappear into the unobservable universe?	1
How long after the Chicxulub impact did the dinosaurs officially go extinct?	1
Can an object have "negative" density?	1
Which animals wouldn't benefit from humanity going extinct?	1
Why do cats stare at walls?	1
Does it matter if you brush your teeth before or after you eat? If so, why?	1
Could an impact or volcanic eruption put enough debris in the atmosphere to cool down the Earth while keeping it livable?	1
Is the Universe infinite AND expanding, or is it expanding at such a rate that it might as well be?	1
Is it possible Earth has some sort of silicon-based life?	1