Extinct animals: interesting facts

As with other extinct animals, these figures are estimates.

It inhabited Turkey, Iraq, Georgia and central Asia.

Weighing 220-436 kg, it was the biggest cat ever. Male lions, by comparison, average 190 kg.

The group are looking to combine its DNA with living pigeons.

This mammal is also the subject of an attempted de-extinction, using as a host its closest relative, the mouse-like dunnart - which weighs 1,000 times less.

It had twice the weight of the largest living raptor, and its usual prey was the huge moa.

This pterosaur had a wingspan of 11 metres, similar to a small plane. Its maximum weight may have been 250 kg, whereas our heaviest flying bird weighs up to 19 kg.

The longest ones measured 21m. There may have been species which were larger than blue whales.

There are also cave paintings depicting this creature.

It was 12m long and stood 8m high.

It is the largest invertebrate ever known to have lived on land.

This amphibious, croc-like carnivore was up to 17m long. Unlike modern whales, it had feet.