He wants to have de-extinction so the world can turn back to the way it was over 65 million years ago.

This wouldn't be the first time a de-extinction project has been successful.

He is also concerned with a variety of animal and environmental ethical questions, particularly de-extinction.

However, there are people who see the usefulness of de-extinction technology for current conservation.

As with all endeavours that challenge the natural order of things, de-extinction has critics.

The "de-extinction" project aims to bring the frog back to life.

To him, de-extinction is "putting the cart before the horse.

Others say de-extinction efforts divert time and money from preserving endangered species.

The group were discussing the possibility of bringing 24 animals back from extinction, also known as 'de-extinction'.

Poll: As scientists discuss the ethics of "de-extinction," which species would you like to bring back from the dead?

It is not just Australian scientists who are pinning their hopes on de-extinction techniques.

Further research must be performed regarding de-extinction to investigate advantages and disadvantages to the technology.

Nevertheless, her birth was still seen as a triumph and has been considered to have been the first de-extinction.

They connected the circle between de-extinction and the prevention of extinction for threatened animal species.

There are many unknowns surrounding the quest for de-extinction.

Proponents of de-extinction, such as George Church, speak of many potential benefits.

He believes that, ultimately, de-extinction technology's greatest impact may be to raise awareness of how much easier it is to protect what we still have.

Zimmer said the last thing that Church and his colleagues want is a genetic free-for-all over de-extinction.

Elsewhere similar "de-extinction" work is going on to find ways of ­resurrecting animals which vanished from the earth hundreds or even ­thousands of years ago.

The de-extinction movement itself is spearheaded by the Long Now Foundation.

Other scholars have published ethical concerns regarding de-extinction.

Molecular biology is improving every day, and high profile projects like de-extinction attract donor dollars.

He just stood there and stared at this abrupt de-extinction, unable to formulate a durable opinion.

This species has been selected by the Long Now Foundation as a potential candidate for de-extinction.

De-extinction, then, is a uniquely self-gratifying brand of conservation.