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

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I've heard that human ventilation rate is controlled by the concentration of carbon dioxide in the blood, not the concentration of oxgyen, because it's more important to precisely control blood pH. When someone drowns or suffocates, is death caused by a drop in blood pH or the loss of oxygen?

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What would happen if the Earth was suddenly cracked in half along the equator?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
I've heard that human ventilation rate is controlled by the concentration of carbon dioxide in the blood, not the concentration of oxgyen, because it's more important to precisely control blood pH. When someone drowns or suffocates, is death caused by a drop in blood pH or the loss of oxygen?	70
What would happen if the Earth was suddenly cracked in half along the equator?	1