How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- Where does the cornea get its oxygen?
“The cornea has no blood vessels and gets oxygen directly from the air.”
Reference: American Academy of Ophthalmology
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Chameleons can move their eyes in two different…
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What is an "otter tail"?
The Labrador Retriever has a thick, rounded, tapering "otter tail" that works like a rudder, helping the dog steer while it swims.