The Human Body
If you uncoiled the DNA packed inside a single human cell, how many meters long would it be?
Answer
2 meters
Two meters of DNA is folded into a nucleus far thinner than a human hair — a packing feat like stuffing 40 km of thread into a tennis ball. Multiply by your trillions of cells and your total DNA would stretch to the Sun and back dozens of times.
Source: National Human Genome Research Institute; Molecular Biology of the Cell
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