thanks to author Ernest Hemingway and his undying love for cats — most of which had six toes. His home and museum in Key West still house many polydactyl kitties. For more information on 4-year ...

But the U.K.-based science writer doesn’t pick just any felines to illustrate science’s emerging understanding of gene regulation—she leans on the six-toed cats popularized by Ernest Hemingway, whose ...