Oetzi Iceman's Tattoos Came from Fireplace

The 57 tattoos sported by Oetzi, the 5300-year-old Tyrolean iceman mummy, were made from fireplace soot that contained glittering, colorful precious stone crystals, according to an upcoming study in the Journal of Archaeological Science.

The determination supports prior research that the tattoos were associated with acupuncture treatments for chronic ailments suffered by the iceman, whose frozen body was found remarkably well preserved in the Similaun Glacier of the Alps in 1991.

The findings also suggest how prehistoric people were tattooed in the days before commercial inks and electric tattooing machines.