Now, with a new fossil discovery described May 22 in the journal Current Biology, scientists believe that a tiger-sized, saber-toothed creature called Inostrancevia migrated 7,000 miles across Pangea.

The fossils are those of Inostrancevia, a giant saber-toothed predator known to science only through Russian fossils until now. The tiger-sized gorgonopsian proto-mammal with reptilian traits ...

Illustration shows the Permian Period tiger-sized saber-toothed protomammal Inostrancevia atop its dicynodont prey ...