c. 150s★★★★★
Ptolemy's Almagest
Claudius Ptolemy completes the Almagest, setting out a geocentric model of the cosmos that remains the standard work of astronomy for over a millennium.
Science· Egypt
Events this year
Ongoing
c. 5th century BCE – c. 5th century★★★★★
Nazca Lines created
In the desert of southern Peru, the Nazca and earlier cultures create enormous geoglyphs on the ground, best seen in full from above.
CultureArt· Peru
c. 1st century BCE – c. 6th century★★★★★
Teotihuacan flourishes
Teotihuacan in the Valley of Mexico grows into one of the largest cities in the world of its time, with the Pyramid of the Sun and the Avenue of the Dead.
Culture· Mexico