/u/Snoo-35252's posts in /r/askscience

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Has teen acne been around since prehistoric times? Did cave-dwellers have zits? Or is it related to modern eating, exercise, pollution, etc.?

713 upvotes

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How long should you leave benzoyl peroxide on your face before washing it off to treat acne?

1 upvotes

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Why do dermatologists recommend using moisturizer? Are there medical dangers of having dry skin?

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Are hiccups a "bug" in the human body, or is there some evolutionary benefit to them?

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What are "tingles" or "chills"?

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Does it require the same amount of energy to fuse hydrogen into helium as it does to fuse heavier elements into even heavier elements? Is the ratio of energy input to energy output about the same for lighter vs. heavier elements?

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Why is it so hard for actors to fake a convincing sneeze?

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Does it affect digestion to eat continuously (without overeating)?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Has teen acne been around since prehistoric times? Did cave-dwellers have zits? Or is it related to modern eating, exercise, pollution, etc.?	713
How long should you leave benzoyl peroxide on your face before washing it off to treat acne?	1
Why do dermatologists recommend using moisturizer? Are there medical dangers of having dry skin?	1
Are hiccups a "bug" in the human body, or is there some evolutionary benefit to them?	1
What are "tingles" or "chills"?	1
Does it require the same amount of energy to fuse hydrogen into helium as it does to fuse heavier elements into even heavier elements? Is the ratio of energy input to energy output about the same for lighter vs. heavier elements?	1
Why is it so hard for actors to fake a convincing sneeze?	1
Does it affect digestion to eat continuously (without overeating)?	1