科学影像封面
摄影
A donkey from Petra, Jordan, carries goods through the rugged landscape, as millions of others have done for millennia. Genetic analysis tracks their journey from a single domestic origin in Africa as early as 7000 years ago to rapid expansions through Eurasia 2500 years later. Ancient genomes also reveal trans-Mediterranean exchange, giant Roman beasts, and previously unknown diversity in the Levant.
Brit Büchner/EyeEm via Getty Images