The Maya civilization is considered one of the oldest and longest-lasting empires. Here's a look at this once magnificent civilization and some of its significant inventions.
Scientists have discovered the most massive and oldest-known Mayan structure using an aerial remote-sensing method in southern Mexico. The pyramid, which measured 400 meters wide, 1,400 long, and 10 to 15 meters high, exceeded the Great Pyramid of Giza built 1,500 years earlier.