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

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How is it that a bird poops two different colors, while only having one poophole? I am dead serious with this question. Thank you.

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Why don't coyotes bark back at my dogs?

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Why are human eyes relegated to brown, blue, green and hazel? Why are there not red, yellow or purple eyes?

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My son dragged me to Jackass Forever....those guys taze each other all the time. I can't imagine this does not have long term effects. Am I wrong?

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Do humans stay active, stay awake, longer than any other land based animal, and if so, why?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How is it that a bird poops two different colors, while only having one poophole? I am dead serious with this question. Thank you.	1
Why don't coyotes bark back at my dogs?	1
Why are human eyes relegated to brown, blue, green and hazel? Why are there not red, yellow or purple eyes?	1
My son dragged me to Jackass Forever....those guys taze each other all the time. I can't imagine this does not have long term effects. Am I wrong?	1
Do humans stay active, stay awake, longer than any other land based animal, and if so, why?	0