Look in the World Civilizations Text Book AP Edition for the answer.
Mayan - architecture (pyramids and places), calendar, numbering system with "0" Aztec - medical advances Inca - communication and medicine
in what country do most medical advances comefrom?
Inca built roads, medican, popcorn, and Quipu (a couting system)
There were many great medical advances that occurred in the 1950's. A few of the best advances was the start of antibiotics, the polio vaccine, and the ultrasound.
Vitamin E was discovered, and so was penicillin and insulin and the first use of a valvulotome.
they cut their stones so exact that they didn't need any cement substances
Technetium is radioactive making it unsafe to use in open builds however it has led to advances in medical tracing.
i only have 2 but they were the first to have surgery on a human skull and to use anethesia. hope i helped!
the 20th century
because there were