Similar tracks elsewhere largely are found in coal beds, not sand dunes, he said. “You could always learn more, and we certainly would like to find more tracks of those same animals,” he said.

A new analysis of three-toed fossil footprints that date back more than 210 million years reveals that they were created by bipedal reptiles with feet like a bird’s.

SCIENTISTS have uncovered the earliest footprints left by animals on Earth, dating back more than half a billion years. The astonishing discovery reveals how creatures with paired legs were seeming… ...

This is the first evidence of animal footprints from the time before Cambrian explosion — the evolutionary event that marked a major surge in Earth’s diversity.

The footprints record a series of events in one day, with a reptile running quickly across the ground. Scientists estimate the animal that made the footprints was about 80 centimeters long and may ...

They say the creature that made the tracks is something like a modern-day chuckwalla lizard that strolled in sand dunes in a coastal plain more than 300 million years ago.

Rock fall at Grand Canyon reveals ancient animal footprints. August 24, ... Some researchers have estimated the footprints are 313 million years old, among the earliest found at the Grand Canyon.