Ancient giant crocodiles may have once walked on two legs, a study shows.
The research focuses on large footprints in the Jinju rock formation in South Korea.
The discovered poorly defined footprints suggested that the ancestors of crocodiles came from a flying reptile called a pterosaur.
However, the new clearer footprints captured the creature’s toes and the texture of its skin, both of which are classically crocodilian, according to a report. Moreover, the tracks measuring between seven and ten inches long are only prints of the back feet.
In the report, Paleontologist Martin Lockley assumed that the lack of footprints means that the ancient crocodile walked only on its back legs.
The prehistoric crocodiles lived during the early Cretaceous period, about 106-million years ago. They usually lived in muddy, lake-covered coastal areas.
Dinosaurs and bird descendants walked on their toes, said Kyung Soo Kim from Chinju National University of Education in South Korea.
Meanwhile, Crocodiles walk on the flat of their feet leaving clear heel impressions. Mr. Kung is part of the team that started its investigation regarding the impressions since 2012.
The tracks left behind showed that the animal put its feet one in front of the other as it walked which is not like the modern crocodiles people see now that keep their feet on the same lane.