BILL SANDERSON / SCIENCE PHOTO LIBRARY BILL SANDERSON / SCIENCE PHOTO LIBRARY
Shared DNA between humans and chimps, conceptual artwork. The humans look surprised to see the chimp so close to them in the double helix of DNA (deoxyribonucleic acid). Humans and chimps, our closest relatives, share around 99% of their DNA. It is thought that the common ancestor of humans and chimps lived as recently as five million years ago.
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