Fun Facts: About 10,000 human cells can fit on the head of a pin
Did you know that 10,000 human cells can fit on the space of a pin head, and that hummingbirds can weigh less than a penny? Learn more with our fun facts of the day!
Did you know that 10,000 human cells can fit on the space of a pin head, and that hummingbirds can weigh less than a penny? Learn more with our fun facts of the day!
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