/u/ketchupkleenex's posts

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How close to Earth could a black hole get without us noticing?

2465 upvotes • r/askscience

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I was not vaccinated against anything as a child. Exactly what risk am I at living normally in a first world country?

2 upvotes • r/askscience

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If humans could see a wider range of the electromagnetic spectrum, how much wider would rainbows get?

1 upvotes • r/askscience

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Can any creatures smell water?

1 upvotes • r/askscience

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As light moves through space and gets red-shifted, where does the energy it loses go?

1 upvotes • r/askscience

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If an astronaut somehow leapt off the space station and began to orbit the earth by themselves, would we be able to find and rescue them? If so, how?

1 upvotes • r/askscience

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Could a black hole be made of anti-matter? Would we be able to tell from the outside if one was?

1 upvotes • r/askscience

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Different people who appear to be the same size can have quite different weights. What differences inside a human body can significantly affect its density?

1 upvotes • r/askscience

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Title	Upvotes	Subreddit	Mark as read	Favorited	Rating	Add to a list
How close to Earth could a black hole get without us noticing?	2465	askscience
I was not vaccinated against anything as a child. Exactly what risk am I at living normally in a first world country?	2	askscience
If humans could see a wider range of the electromagnetic spectrum, how much wider would rainbows get?	1	askscience
Can any creatures smell water?	1	askscience
As light moves through space and gets red-shifted, where does the energy it loses go?	1	askscience
If an astronaut somehow leapt off the space station and began to orbit the earth by themselves, would we be able to find and rescue them? If so, how?	1	askscience
Could a black hole be made of anti-matter? Would we be able to tell from the outside if one was?	1	askscience
Different people who appear to be the same size can have quite different weights. What differences inside a human body can significantly affect its density?	1	askscience