Complex sentence: The mummy, a small boy who is of black African origin's displays a highly sophisticated mummification technique as like the Egyptian and when carbon dated the mummy was around 5,500 years old is older than any comparable Ancient Egyptian mummy.
Split into simpler sentences: The mummy, a small boy who is of black African origin displays a highly sophisticated mummification technique. When carbon dated the mummy was around 5,500 years old is older than any comparable Ancient Egyptian mummy.