What’s the greatest discovery in the history of biology? If you said “seedless watermelons,” you’re close. Actually, it’s probably the discovery of DNA.
It’s hard to imagine in this age of genetic engineering, but scientists in Darwin’s time saw life as quite simple. Cells were thought to be blobs of primitive chemicals called “protoplasm.” But as technology advanced and scientists were able to peer inside the cell, they discovered something amazing: Every living thing actually contains intricate, microscopic machines, performing functions without which life would not be possible.
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