Albert Einstein was a famous German scientist born in 1879. He had revolutionary ideas about physics and relativity that changed people's understanding of the universe. Some of his key accomplishments included developing the special theory of relativity in 1905 and the general theory of relativity in 1915. He won the Nobel Prize in Physics in 1921 and later immigrated to the United States in 1933. Einstein was considered one of the greatest scientists of all time and made breakthrough discoveries in physics and mathematics through his curiosity, hard work, and unique way of thinking.