Now, a New York–based startup called Manhattan Genomics is reviving the debate around gene-edited babies. Its stated goal is to end genetic disease and alleviate human suffering by fixing harmful mutations at the embryo stage. The company has announced a group of “scientific contributors” that includes a prominent in vitro fertilization doctor, a data scientist who worked for de-extinction company Colossal Biosciences, and two reproductive biologists from a major primate research center. A scientist who pioneered a technique to make embryos using DNA from three people is also involved.