IQ scores have been measured (测量)since 1916, when Alfred Binet developed his intelligence list as follows:

    Some very famous people are known for their high IQ level. Jill St. John who has the highest score on this list was a major American film actress during the 1960's and 1970's. Jill was chosen to the University of California at the age of 14.

    Scientists have estimated (估算)the IQ scores that some famous historical people might have got. This was done by looking at their work and their ideas and the way they put them together Leonardo da Vinci gets that high score not only for his art but also for his idea of the helicopter (直升飞机). Without modern scientific tools, he created a lot of design drawings and patterns, which was ahead of his time.