Mernat Mafirakurewa, AfricaNews reporter in Johannesburg, South Africa
Scientists with Witwatersrand University in Johannesburg, South Africa have discovered a new species of dinosaur. A media briefing by Australian Dr Adam Yates said the discovery follows five years of investigating. The dinosaur is estimated to be between 183 and 195 years old.

The discovery was made by a Wits postgraduate palaeontology student, Marc Blackbeard, who began excavating two sites in the Northern Free State, five years ago, under the leadership of Yates.
"We knew that there was likely to be some fossils in these 'bone beds' discovered by James Kitching about 20 years ago, but we did not expect to find anything of this magnitude," said Yates. “This is one of the many jewels South Africa has,” he said.
Yates believes the dinosaur was possibly half a ton (500 kilograms) and between 12 and 15 metres in length. He said it was a plant eater with small teeth adding that it had short forearms compared to its hind legs and has been named Aardonyx celestae, which means "Earth Claw" ("Aard" - Afrikaans for Earth, plus "Onyx" - Greek for claw.)
Fossils from two Aardonyx were found, one which was 7m long and the other 9m long. Yates said the dinosaur shared traits of evolutionary precursors to the sauropods, which dominated the Jurassic period. Sauropods were plant eaters that walked on four-legs and dominated the Jurassic period. Aardonyx, by contrast, walked on two legs but is believed to have occasionally also used its forelegs to walk.
"Aardonyx gives us a glimpse into what the first steps toward becoming a sauropod involved. It tells us the changeover was not smooth, and the evolution was complicated," Yates said.