Einstein became a U.S. citizen in 1940.

Check out more hashtags that other people found fun like Anniversary, Cyberpunk or Philadelphia. Find out the age, birthday, star sign, height, relationships and career highlights of your favorite celebrities. Whether you’re interested in facts about Fashion, Music or Business or you just want to see articles and fun facts from Rising Stars like Illenium, we got you covered! Scroll through thousands of fun facts on profiles of the likes of Victoria Beckham, SZA or Benedict Cumberbatch or find them in categories like Society and Art.