In its 4.5 billion year history, Earth has undergone five mass extinctions and we are potentially in a sixth era of mass ...

One answer might be that, because long-extinct species pose the hardest biological challenges, working on de-extinction in these animals pushes scientists to develop cutting-edge genetic ...

Cloning has been used to briefly bring back the pyrenean ibex, which went extinct in 2000. In 2003, a Spanish team brought a cloned calf to term, but the animal died a few minutes after birth.

"The Endangered Species List has become like the Hotel California: Once a species enters, they never leave," Secretary of the Interior Doug Burgum wrote Cover Images via AP Images; Getty Images ...

Aunt_Spray / Getty Images Replicas of the now-extinct Dodo birds The post continued ... and nonessential experimental population. Some animals on the endangered species list include cheetahs, lemurs, ...

But in the end, she said she’s not really hung up on what the animals are called beyond their names, inspired by founders of Rome and the “Game of Thrones” show. “Call it a de-extinct dire ...

These adorable little animals look like white puppies, not the fruit of a daring science project to resuscitate an extinct ...

The recent claim the long extinct dire wolf was resurrected made headlines around the world. But bioethicists and ecologists ...

They crawled hesitantly, whimpered softly, and drank from baby bottles — a sight more akin to adorable white puppies than the controversial product of an unprecedented de-extinction initiative.

Will womb transplants transform fertility? What should we make of 'de-extinction' claims? And why are prices falling in the art market? Olly Mann and The Week delve behind the headlines and debate ...