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

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Why aren't people born with hair colors like purple, blue, green, etc.? Why is it only red, black, brown, and blonde?

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In terms of hearing very quiet and/or distant sounds; is it more beneficial to have ears on the side of the head, (humans) or closer to the top, (cats and dogs)?

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With all other factors being constant, would a person burn more calories running 1 mile in 90°F or 30°F?

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Is there a correlation between marine-life size and what depth they reside in the ocean? And if so, how deep in the ocean would Godzilla's lair be?

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What brought about and ended the 1918 Spanish Flu?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why aren't people born with hair colors like purple, blue, green, etc.? Why is it only red, black, brown, and blonde?	1
In terms of hearing very quiet and/or distant sounds; is it more beneficial to have ears on the side of the head, (humans) or closer to the top, (cats and dogs)?	1
With all other factors being constant, would a person burn more calories running 1 mile in 90°F or 30°F?	1
Is there a correlation between marine-life size and what depth they reside in the ocean? And if so, how deep in the ocean would Godzilla's lair be?	1
What brought about and ended the 1918 Spanish Flu?	1