But did you know that scientists have had the ability to clone fully-grown mammals for decades? In fact, the first successful ...

Getty Images Dolly the sheep, pictured, became the first cloned mammal when she was born in 1996 It was 10 years later, in 2016, when a vet had to give him the bad news that Princess had cancer.

It was the first time scientists had been able to clone a mammal from an adult cell, taken from the udder. Science Photo Library Dolly the sheep was the first mammal to be cloned 20 years ago ...

"It's the first cloned black-footed ferret to have offspring ... All other black-footed ferrets in the U.S. are descendants of just seven other animals, and Willa's biological samples contain ...