250 million years ago, the globe was hit by an extreme mass extinction.
96 percent of all species in the oceans became extinct and 70 percent of all terrestrial animals.
It was the largest mass extinction in the history of the earth and is believed to have been caused by huge volcanic eruptions in Siberia.
Carbon dioxide filled the atmosphere and the earth's temperature rose several degrees.
Survived the disaster
But an animal that actually seems to have survived the disaster is a dog-like creature, Lystrosaurus.
In the movie "Antarctic dinosaurs" you can see how paleontologists find a fossil from the small animal.
- It is a survivor, one of the few terrestrial species that survived the mass extinction at Perm, says Pete Makovicky, paleontologist at the University of Minnesota.
Found dinosaur
After the disaster, a whole new world emerged.
Antarctica was covered by greenery and flowing rivers and completely new animal species developed.
Paleontologists have found fossils from a dinosaur that trampled around Antarctica 190 million years ago, namely a Cryolophosaurus.
It was excavated in 1991 by paleontologist Bill Hammer.
- It was the most fantastic I have been through, and also the most difficult, he says.
Watch "Antarctic dinosaurs" in the World of Science on Monday 4 April 20:00 on SVT2 or already now on SVTplay.
Lystrosaurus lived in Antarctica 250 million years ago.
Photo: From the World of Science, SVT