The smartest person on the Earth nowadays is considered by many to be Terence Tao, a professor of mathematics at UCLA, who rightfully has the nickname "the Mozart of maths." Professor Tao's recent IQ test showed a result of 230 - and this is simply unbelievable. For example, Albert Einstein never took an IQ test, but many researchers estimate his score at 160.
And what about the dumbest person ever? There are definitely no clear criteria here, and each person has their own point of view on what is considered stupid and what is not. However, people are willing to share their observations on this matter on the internet.
More info: X
