Terence Tao has been years ahead of everyone else his entire life. Tao started taking high school classes at age eight; by 11, he was learning calculus and thriving in international mathematics competitions. He was only 21 when he earned his Ph.D. from Princeton
Here there is an good intrduction article,it is Writen by Arithmetic(he is studing in French on Algebraic Geometry) on the web:www.changhai.org. 代数几何学的抽象化演进