The discovery of a fossilised large predator is a rare event that offers insight into these beasts from the past.
A study has found that a local event rather than a global shift in climate caused the mass extinction in South Africa.
Climate was the main factor that triggered the evolution of warm-bloodedness in mammals and the subsequent mammalian evolutionary success.
CT scanning allows scientists to observe and "dissect" fossils digitally using computer software - and to uncover secrets that are hundreds of millions of years old.
Much like the hair you carefully rearrange before a selfie, your cheek muscles and the accompanying smile date back about 250 million years.