Historical records claim incest was rampant among rulers of ancient Egypt who believed they descended from the gods.
But this has always been difficult to prove because scientists were unable to get access to the mummies' tissues for DNA analysis.
Now, a new study of 259 mummies has provided direct evidence of incest by measuring Pharaohs' height variations and comparing it to the variation of the general Egyptian population at the time.
Pharaohs didn't stray far for sex: Scientists find proof of incest in differences in height of royal mummies | Daily Mail Online