Two mummies that have been on display in a Manchester, England museum for the past century are not actually full brothers, as we reported recently. And the fascinating history behind these two mummies is what really makes this a unique story.

Scientists discovered that Nakht-Ankh and Khnum-Nakht, two mummies that have been on display since 1908, were actually half brothers who were born 20 years apart to the same mother but different fathers. They were found in the Tomb of Two Brothers, which is a sepulchre discovered in 1907 in Deir Rifey in Egypt.

Scientists had long suspected that they may not be full brothers due to different skull shapes and differences in the complexion of their skin scraps, but a recent genetic analysis has proven that they are not fully brothers.

Nakht-Ankh and Khnum Nakht are believed to be high-status priests in ancient Egypt society during the 12th dynast. The tomb was discovered by Flinders Petrie, and the tomb group is now entirely on display at the Manchester Museum as the best preserved burial in Egypt’s Middle Kingdom.