Archaeologists have recently stumbled upon a set of mysterious "ghost footprints" in the deserts of Utah.
The researchers accidentally found them in early July when they were travelling to another nearby site of archaeological excavations at the Hill Air Force base in the Great Salt Lake desert in Utah State, where the team initially found only a few traces, but a thorough search of the area using georadar revealed at least 88 separate traces, all of which belonged to adults and children under the age of 5.
Ghost prints left bare human legs at least 10,000 years ago, when this area was still a vast marshland, but researchers suspect that the footprints could have appeared 1 to 2,000 years ago during a period of the last ice age in the age of playstone.
The discovery of so many ancient traces is "a find that happens once in a lifetime," said Anya Kitterman, the cultural resource manager at the Hill Air Force Base who ran archaeological works. "We found much more than we expected."
However, the discovery has not yet been published in the peer-reviewed journal because researchers are still analysing the tracks.