Some 4,000 years ago, as ancient civilizations such as the Minoans in Crete and the Neo-Sumerian Empire in Mesopotamia were shaping cultures in Europe and the Middle East, human biology itself was ...
Researchers have analyzed ancient DNA from Borrelia recurrentis, a type of bacteria that causes relapsing fever, pinpointing when it evolved to spread through lice rather than ticks, and how it gained ...