Cloning

If scientists could resurrect extinct animals — such as the dodo, Columbian mammoth or Tasmanian tiger — should these animals have different names that distinguish them from the original species?

Today marks the 20th anniversary of the announcement of Dolly the sheep, the first mammal cloned from an adult cell.

Four cloned sheep that are genetically identical to Dolly, the first cloned mammal, are still healthy even in old age, a new study found.

The woolly mammoth's genome has been sequenced, revealing several key adaptations to the cold that could help scientists design elephant-mammoth hybrids.

An ancient mammoth preserved in permafrost could yield the best hoping of cloning the extinct beast yet.

An ancient mammoth preserved in permafrost could be the best chance of cloning the extinct beast yet.

A new technique for creating stem cells shows they can be made in a way that reduces the risk of these cells dividing haphazardly and becoming cancerous.

Advances in biotechnology could enable scientists to bring woolly mammoths and other extinct animals back from the grave. But critics argue that the practice will only hinder conservation efforts.