'Ghost footprints' left by ancient hunter-gatherers discovered in Utah desert
Researchers have uncovered at least 88 human footprints in a Utah desert that date back to the last ice age, after accidentally stumbling upon a group of 'ghost' tracks that became visible after a rain shower.
Researchers have uncovered at least 88 human footprints in a Utah desert that date back to the last ice age, after accidentally stumbling upon a group of 'ghost' tracks that became visible after a rain shower.
