Einstein was born in 1879 in Germany. As a child he was slow to talk. But when he was 14 years old, he became clever. He taught himself maths from text books. He studied hard because he wanted to be a physicist (物理学家).
In 1901, Einstein began teaching. In 1902, he went on with his study at the University of Zurich. Several years later, he put forward (提出)his Theory of Relativity(相对论).
To most people the Theory of Relativity is hard to explain. But once Einstein explained it very well to a group of young students. He said:" When you sit with a good girl for two hours, you think it is only a minute, But when you sit on a hot fire for a minute, you think it's two hours. That's relativity".
Later Einstein went to America and never left there. His life ended at the age of 76.
