Tattoos have been a part of human culture and art for over 5,000 years. Recently, researchers used laser technology to find hidden tattoos on mummies from Peru’s Chancay culture, which existed around 1250 A.D., before the Inca Empire. They studied about 100 mummies and found tattoos mostly on hands, knuckles, and forearms. Four mummies had detailed patterns, including triangles and diamonds. These tattoos were invisible to the eye but appeared when lasers made the skin glow. This research was published in the Proceedings of the National Academy of Sciences and shows how technology can help us learn about the past. These tattoos are more than just art. Experts say they reveal important information about ancient cultures, like their beliefs and social systems. Michael Pittman, a researcher, said the tattoos were as skillfully made as modern ones. Archaeologists Lars Krutak and Martin Smith believe studying tattoos helps us understand ancient art and culture better, along with other crafts like pottery and textiles. Laser imaging is also helpful because it does not damage fragile artifacts, making it an important tool for studying history.