Researchers Perplexed How 3,000-Year-Old “Locked-Mummy” Was Placed Inside Coffin With No Entry PointChicago’s Field Museum had dozens of ancient Egyptian mummies, but one of them captured their attention. The mummy of an aristocrat named Chenet-aa, who lived 3,000 years ago was named the ‘locked mummy.’ This was because she was rested in a coffin with no visible entrance using some unusual burial method. Scientists at the Field Museum executed CT X-ray scans of the coffin, which revealed the wrappings that helped preserve the mummy’s remains over the years. JP Brown, senior conservator of anth…