Pioneers in the science of "de-extinction," an American company has announced the births of three pups whose genes resemble those of a species that hasn't roamed Earth for millennia

Romulus and Remus were made to look like dire wolves, but scientists question the science behind their de-extinction claims

Dire wolves, made famous by “Game of Thrones,” went extinct some 13,000 years ago. Now, researchers have bred gray-wolf pups that carry genes of their ancient cousins.