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Sinding, who has extracted ancient DNA from Pleistocene wolves, woolly rhinoceroses and aurochs, was surprised and excited to hear that Colossal Biosciences planned to re-create the dodo.

Banning offers another take on the bull scene: Rather than cowering with a rattle, the person may be crouching with a lasso, about to capture an aurochs, the extinct ancestor of domesticated cattle.

Bruno drives his battered Jeep through one of the most history-rich regions on Earth, where cave walls portray the aurochs and woolly mammoth.

In the distant past, roaming herds of grazing animals like the now-extinct aurochs are thought to have kept trees away from such meadows.

She found that bullfighting breeds, which are bred for aggression and tend to have little human interaction outside fighting in the ring, have brain sizes nearly as large as those of wild aurochs.