3.愛因斯坦有1472頁的聯邦調查局(FBI)卷宗。

在1993年，正當愛因斯坦即將開始他的第三次美國之行，美聯邦調查局開始記錄他的檔案。這份檔案主要記錄愛因斯坦一生中同和平與社會主義組織的聯繫，這份檔案最終記錄了1472頁。根據《外來移民排除法案》，約翰·埃德加·胡佛甚至建議拒絕愛因斯坦踏入美國，該建議被美國國務院拒絕。

3.He had a 1,427-page FBI file.

In 1933, the FBI began keeping a dossier on Albert Einstein, shortly before his third trip to the U.S. This file would grow into 1,427 pages of documents focused on Einstein’s lifelong association with pacifist and socialist organizations. J. Edgar Hoover even recommended that Einstein be kept out of America by the Alien Exclusion Act, but he was overruled by the U.S. State Department.

4.愛因斯坦曾有一個私生子。

1902年，愛因斯坦的未婚妻米列娃未婚生育了一名女嬰，而她那時正與她塞爾維亞的家人在一起。這名女嬰名叫裡瑟爾，歷史學家們一致認為裡瑟爾要麼由於猩紅熱早年夭折，要麼被收養，總之愛因斯坦從未見過他的這個女兒。直到1987年，由於愛因斯坦信件的公開，大多數人們才知道里瑟爾的存在。

4.He had an illegitimate baby.

Einstein’s future wife Mileva gave birth out of wedlock to a baby girl in 1902 while staying with her family in Serbia. The baby was named Lieserl, and it’s believed by historians that she either died in infancy, probably of scarlet fever, or was given up for adoption. In all likelihood, Einstein never saw his daughter in person. Lieserl’s existence wasn’t widely known until 1987, when a collection of Einstein’s letters was made public.

5.愛因斯坦為了與第一任妻子離婚，把諾貝爾獎獎金全部送給了他第一任妻子。

愛因斯坦把將要獲得的諾貝爾獎獎金全都給了他的第一任妻子米列娃·馬利奇，以便她能夠同意離婚。這筆獎金一共32250美元，這比當時一名普通教授年薪的10倍還多。

5. He paid his first wife his Nobel Prize money for a divorce.

Anticipating winning a Nobel Prize, Einstein offered all his expected prize money to his first wife, Mileva Marić, so she would agree to grant him a divorce. The award added up to $32,250, which was more than ten times the annual salary of the average professor at the time.