How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- Why do we get goosebumps?
“Goosebumps are a leftover reflex from furrier ancestors, whose hair stood up to trap warmth or look bigger.”
Reference: Scientific American
More from this shelf
What is the largest organ in the body?
Skin is the body's largest organ, covering about 20 square feet in adults.
Why do horses have hooves instead of toes?
A horse's hoof is actually a single giant toe, the result of millions of years of evolution from small, multi-toed ancestors to a body built for running.