Fig. 3
From: Unlocking the origins and biology of domestic animals using ancient DNA and paleogenomics
Geography of archaeological DNA survival prior to the discovery of high endogenous DNA content in the mammalian petrous bone. a Expected DNA survival after 10,000 years for 25-bp fragments and 150-bp fragments close to the ground surface (modified with permission from [90]). b Illustration of a sheep (Ovis aries) petrous bone retrieved from a Middle Neolithic site at Le Peuilh, France (modified with permission from [269])