Answer: The correct answer is : The Chaldeans were well known for their great achievements in different fields, such as: The 60's system, which has 60 minutes, lunar and solar calendars, the time system: day, month, year, said that the moon, the sun, the earth and other 5 planets make up a single system, they made great contributions in algebra and geometry, in astronomy they invented the zodiac system, they invented the hanging gardens that became one of the 7 wonders of the world.