In the case of Egyptian mummies , they have had all their internal organs removed . Christina Warinner : Dental plaque contains valuable information . Studying genome is n't enough ; we need to study evolution of human diseases , she says . Comment: By extracting DNA from fossilized tartar , we learn about health of ancient humans . She says understanding our evolutionary vulnerabilities will help us improve our health .
Christina Warinner : Dental plaque contains valuable information . Studying genome is n't enough ; we need to study evolution of human diseases , she says . Comment: By extracting DNA from fossilized tartar , we learn about health of ancient humans . She says understanding our evolutionary vulnerabilities will help us improve our health .