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JOHANNESBURG — A newly discovered dinosaur species that roamed the Earth about 200 million years ago may help explain how the creatures evolved into the largest animals on land, scientists in South Africa said Wednesday.
The Aardonyx celestae was a 23-foot-long small-headed herbivore with a huge barrel of a chest. It walked on its hind legs but also could drop to all fours, and scientists told reporters that could prove to be a missing evolutionary link.
