In 1995, he and Thomas Bopp spotted, from different states, the same mysterious object in the sky. What turned out to be a comet was named after them: Hale-Bopp.
Her decades of work on Huntington's disease helped lead to the creation of a genetic test for the devastating condition. Why didn't she take it herself?
Fertility specialists, biotech companies and ethicists are divided over whether progress in early gene editing would wipe out diseases or trigger a rush toward enhancement.