let alone a milestone on the way to bringing back woolly mammoths, which last roamed Earth some 4,000 years ago. “It’s far away from making a mammoth or a ‘mammoth mouse’,” says Stephan ...

A woolly mouse compared with a normal mouse ... In addition to the mammoth, they would also like to bring back the dodo and the thylacine—or Tasmanian tiger. “Our three flagship species ...