Did a Copying Mistake Make Humans So Smart?

Mistakes made during cell division long ago may have lead to the sophistication of the modern human brain.

A copyediting error appears to be responsible for critical features of the human brain that distinguish us from our closest primate kin, new research finds.

When tested out in mice, researchers found this “error” caused the rodents’ brain cells to move into place faster and enabled more connections between brain cells.