Instead of killing neurons outright, however, relatively mild inflammation only destroys the arm-like projections, called ...

The human neurons grew multiple neurites, wiry projections that help the nerve cells send and receive signals. But the chimp neurons only grew single neurites. When human HARs were engineered into ...

Artificially-derived chimpanzee neurons grow only one or two neurites (connecting wires), as shown in the center image. Human-accelerated regions (HARs) in chromosomes help human neurons grow multiple ...