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

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[biology] What accounts for the black/deep purple anthocyanin pigment showing up in radically different plants? (Purple garlic, black rice, black beans, purple potatos of various kinds, red kale, purple asparagus, purple plum trees, grapes, purple cactus, etc. )

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What determines when acoustic design should attempt to reflect sound vs. direct it as if it flows, such as in brass instruments or sub-woofer "wave guides"?

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How does an animal not poison itself with its own venom if no anti-venom exists for its venom?

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Would the centrifugal force imparted on things by the spin of the earth cause things to weigh less at the equator than at the north and south poles?

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Does lift depend on the distance from the ground

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
[biology] What accounts for the black/deep purple anthocyanin pigment showing up in radically different plants? (Purple garlic, black rice, black beans, purple potatos of various kinds, red kale, purple asparagus, purple plum trees, grapes, purple cactus, etc. )	1
What determines when acoustic design should attempt to reflect sound vs. direct it as if it flows, such as in brass instruments or sub-woofer "wave guides"?	1
How does an animal not poison itself with its own venom if no anti-venom exists for its venom?	1
Would the centrifugal force imparted on things by the spin of the earth cause things to weigh less at the equator than at the north and south poles?	1
Does lift depend on the distance from the ground	1