How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- Why is polar bear liver toxic?
“Polar bear liver contains so much vitamin A that eating it can poison humans.”
Reference: Scientific American
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Can the liver regrow?
The liver can regenerate. When part of it is donated, both the donor's liver and the transplanted portion can grow back to nearly full size.
Polar bears all have one thing in common
Bet you didnt know that all polar bears are left handed? (or left pawed if ya gonna be picky)