London, October 14 : A team of French researchers has confirmed that "devils'' trails" preserved in volcanic ash atop the Roccamonfina volcano in Italy are the oldest human footprints, and that their owners were Homo heidelbergensis.
Study leader Stephane Scaillet, an expert from the Laboratory of Climatic and Environmental Sciences, has revealed that the research team used argon-dating techniques to verify the age of the prints.
"Their more rigorous methods confirm that these are the oldest human footprints ever found," New Scientists magazine quoted him as saying.
Based on when the volcano was thought to have last erupted, the researcher reckoned that the prints might have been between 385,000 and 325,000 years old.