/u/kevin4789's posts in /r/askscience

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If you had a million mirrors placed in such a way that each would reflect off the next one, and you stand in front of one and move, would there be any lag between your movement and what appears on the final mirror?

3346 upvotes

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Why do dogs smell bad when wet?

3303 upvotes

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If we can lose hundreds of skin cells by scratching at them, why is it hard to rub off pen or marker on our skin?

2856 upvotes

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Why is the center of the Milky Way bright if it is a black hole?

2787 upvotes

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What causes an "aftertaste"?

1482 upvotes

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What would happen if two black holes that are equal in every way were right next to each other?

308 upvotes

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Are new viruses spontaneously mutated? In one million years will humans be immune to all viruses on Earth?

136 upvotes

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Why is the reflection of a projector green?

92 upvotes

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Why are some dogs very particular to certain toys? What about the toys is appealing to them?

39 upvotes

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Do we protect our head before potential injuries because we were taught to or because it is human instinct?

31 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If you had a million mirrors placed in such a way that each would reflect off the next one, and you stand in front of one and move, would there be any lag between your movement and what appears on the final mirror?	3346
Why do dogs smell bad when wet?	3303
If we can lose hundreds of skin cells by scratching at them, why is it hard to rub off pen or marker on our skin?	2856
Why is the center of the Milky Way bright if it is a black hole?	2787
What causes an "aftertaste"?	1482
What would happen if two black holes that are equal in every way were right next to each other?	308
Are new viruses spontaneously mutated? In one million years will humans be immune to all viruses on Earth?	136
Why is the reflection of a projector green?	92
Why are some dogs very particular to certain toys? What about the toys is appealing to them?	39
Do we protect our head before potential injuries because we were taught to or because it is human instinct?	31