A timeline shows important events of the era. In ca. 13,000 to ca. 7000 BCE, humans cross the land bridge between Asia and North America. In ca. 5000 BCE, corn is domesticated in Mesoamerica; an illustration of the corn plant is shown. In ca. 2000 BCE to ca. 900 CE, Mayan civilization flourishes in the Yucatán Peninsula; Mayan pottery is shown. In 622, <PERSON> receives the vision for Islam; an illustration of <PERSON> is shown. In ca. 1000, <PERSON> arrives in present-day Canada; a painting depicting <PERSON>'s arrival is shown. In ca. 1100, Cahokia is at its peak near modern St. Louis. In 1325--1521, Aztec civilization flourishes in present-day Mexico; a map of Tenochtitlán is shown. In 1346, the Black Death decimates Europe; an illustration of Black Death victims is shown. In 1492, Columbus arrives in the Bahamas; a painting of Columbus's arrival is shown. In 1400--1532, the Inca Empire thrives in South America.