/r/askscience

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Can non-human animals be allergic to other animals? E.g. can a cat be allergic to me?

799 upvotes • [deleted]

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If Crude oil is made from decaying plant and animal matter, wouldn't the fact that the moon Titan has large crude oil deposits suggests that life at some point existed on this planet?

799 upvotes • PatrickTheStarfishe

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Why does artificially raising your heart rate (via caffeine or other substances) not act a substitute for cardiovascular exercise?

799 upvotes • Wilsoncola

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Do we have any proof of evolution in humans in the last 2000-3000 years? No matter how insignificant it may be..

798 upvotes • blackdragon437

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Do we know the average lifespan of dinosaurs? How would we know such a thing?

798 upvotes • [deleted]

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Is it possible to voluntarily control your own heartbeat like we can control our breathing?

798 upvotes • scarybubble

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Why is smiling considered a friendly action when exposing the teeth seems to be naturally aggressive?

798 upvotes • silvertongue_za

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Are sounds quieter at higher altitudes?

798 upvotes • Waukigu

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Is there an anatomical reason Chicken Pox scars form where they do?

798 upvotes • [deleted]

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Can someone explain how Q is calculated with different fusion systems and why some parts of the energy inputs can be ignored?

798 upvotes • reckless_avacado

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Can non-human animals be allergic to other animals? E.g. can a cat be allergic to me?	799	[deleted]
If Crude oil is made from decaying plant and animal matter, wouldn't the fact that the moon Titan has large crude oil deposits suggests that life at some point existed on this planet?	799	PatrickTheStarfishe
Why does artificially raising your heart rate (via caffeine or other substances) not act a substitute for cardiovascular exercise?	799	Wilsoncola
Do we have any proof of evolution in humans in the last 2000-3000 years? No matter how insignificant it may be..	798	blackdragon437
Do we know the average lifespan of dinosaurs? How would we know such a thing?	798	[deleted]
Is it possible to voluntarily control your own heartbeat like we can control our breathing?	798	scarybubble
Why is smiling considered a friendly action when exposing the teeth seems to be naturally aggressive?	798	silvertongue_za
Are sounds quieter at higher altitudes?	798	Waukigu
Is there an anatomical reason Chicken Pox scars form where they do?	798	[deleted]
Can someone explain how Q is calculated with different fusion systems and why some parts of the energy inputs can be ignored?	798	reckless_avacado