This week, the world met the woolly “mammouse”—a genetically engineered mouse with woolly mammoth hair. The scientists at Colossal Biosciences who created it think it’s a promising step toward their ...

A woolly mouse compared with a normal mouse, at Colossal Biosciences labs. Editor at Large Extinction is typically for good. Once a species winks out, it survives only in memory and the fossil record.

Forbes contributors publish independent expert analyses and insights. Eric Mack is a reporter covering science, sustainability and space. One of the more unheralded scientific advancements of the past ...