Egli injects a human egg with a sperm carrying a genetic mutation that causes blindness and a CRISPR tool he hopes will fix the mutation.

Egli injects a human egg with a sperm carrying a genetic mutation that causes blindness and a CRISPR tool he hopes will fix the mutation.

Egli injects a human egg with a sperm carrying a genetic mutation that causes blindness and a CRISPR tool he hopes will fix the mutation.

Egli injects a human egg with a sperm carrying a genetic mutation that causes blindness and a CRISPR tool he hopes will fix the mutation.