Archaeologists working in Egypt uncovered a stunning collection of mummy portraits in 1899. Eerily familiar, the works are likenesses of the dead attached to their mummified remains, and they were created when the Romans held sway in Egypt some 2,000 years ago. The portraits had languished in storage ever since their discovery. But by 2015 scientists and conservators were re-evaluating these paintings – and they’ve made some startling findings.