Experts at the British Museum and computer specialists Silicon Graphics used a hospital X-ray machine to scan Nesperennub, a 2,800-year-old mummy.

In a world first, they have found out loads of information about his health, what he looked like, and that he was in his 40s when he died.

"Mummy: The Inside Story" opens at the museum in London on Thursday.

The museum already knew Nesperennub was a priest because of markings on his case.

They have now produced a reconstruction of his face, so you can really come face-to-face with the past.

Silicon Graphics already have a bit of experience with ancient Egypt - they produced some of the effects for the film The Mummy Returns.