08 November 2019
Vol 366, Issue 6466

About The Cover

Cover image expansion

COVER Time-lapse image of the Roman Colosseum, which symbolizes the power and durability of Rome—one of the largest cities of the ancient world and seat of an empire of ~70 million people. A sample of ancient genomes spanning 12,000 years reveals that, from ~3000 years ago on, Rome had a population of diverse ancestries. Rapid genetic shifts in historical time reflect movements of people as Rome's political connections and trade networks changed. See pages 673 and 708.
Credit: Mark Bassett/Alamy Stock Photo