Unknown reptiles lived on Earth 310 million years ago.
Researchers warn that a number of prints extend to the meter and an unusual way – on the diagonal. The traces belong to the Carboniferous period when the plants of the gymnastics and the first reptiles were settled on Earth. "The tracks look like two lizards have risen next to each other, but lizards do not walk next to each other, they do not," said Professor Neven University Stephen Rowland.
Scientists have put forward some of the options that would leave such strange impressions if an unreliable reptile who hit with a purpose would be. It could, for example, be a side wind: if it were strong enough, the animal could have caused diagonal movement. Another option – a strong slope, which was then also the surface of a smashable animal while walking. It is still possible for the trail to remain in a competition with an enemy or some kind of ritual to attract an officer.