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

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With clocks like the cesium atomic clock, we know that the measurement is accurate to within an infinitesimal fraction of a second, but how do we know what a second is exactly?

514 upvotes

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How did the photographers of the first nuclear test ever know what filter and film exposure combination to use to get a clear image of it?

34 upvotes

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If I pee in a certain place in my back yard, will my dog smell it and recognize that this is my territory? Do humans have those chemicals in their pee, and can they be recognized across species?

6 upvotes

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Do wolves drag their asses on the ground to scratch butt itches like dogs, or is that a new thing in domesticated dogs?

4 upvotes

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Why is it that alcohol in combination with paracetamol can cause liver damage due to glutathione issues but alcohol on its own does not?

3 upvotes

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Why are children able to watch the same movie or TV episode over and over and enjoy it so much while adults rarely can?

2 upvotes

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Is it possible to "sleep off" alcohol intoxication? Do our bodies metabolize alcohol at different rates when asleep or awake?

2 upvotes

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How hot would Venus be with an atmosphere composition identical to ours instead of its current "runaway greenhouse effect?"

1 upvotes

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How does capsaicin get into my pee after I eat really spicy foods? NSFW

1 upvotes

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Why do some animals not recognize their own tails, especially tail movement?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
With clocks like the cesium atomic clock, we know that the measurement is accurate to within an infinitesimal fraction of a second, but how do we know what a second is exactly?	514
How did the photographers of the first nuclear test ever know what filter and film exposure combination to use to get a clear image of it?	34
If I pee in a certain place in my back yard, will my dog smell it and recognize that this is my territory? Do humans have those chemicals in their pee, and can they be recognized across species?	6
Do wolves drag their asses on the ground to scratch butt itches like dogs, or is that a new thing in domesticated dogs?	4
Why is it that alcohol in combination with paracetamol can cause liver damage due to glutathione issues but alcohol on its own does not?	3
Why are children able to watch the same movie or TV episode over and over and enjoy it so much while adults rarely can?	2
Is it possible to "sleep off" alcohol intoxication? Do our bodies metabolize alcohol at different rates when asleep or awake?	2
How hot would Venus be with an atmosphere composition identical to ours instead of its current "runaway greenhouse effect?"	1
How does capsaicin get into my pee after I eat really spicy foods? NSFW	1
Why do some animals not recognize their own tails, especially tail movement?	1