In the early 160s AD, Galen moved to Rome to work and, with the exception of a brief return to Pergamum, spent the remainder of his life in the Roman capital. He became physician to the emperor Marcus Aurelius and would later serve in the same role to Aurelius's successors, Commodus and Septimius Severus.
A primitive corn was being grown in southern Mexico, Central America, and northern South America 7,000 years ago. Archaeological remains of early maize ears, found at Guila Naquitz Cave in the Oaxaca Valley, date back roughly 6,250 years; the oldest ears from caves near Tehuacan, Puebla, date ca. 3,450 BC.
Sweet corn is harvested fresh, and typically grown near where it is consumed. The earliest corn matures in about two months, the latest in about 3 months. Many gardeners plant early, mid, and late season varieties at the same time to extend the harvesting season.