9 'secrets' about Albert Einstein

There are interesting "secrets" about Albert Einstein's genius that fans may not have a chance to know.

1. He gave up German citizenship when he was 16 years old

From a very young age, abe did not like national forms and he considered himself a global citizen. At the age of 16, he gave up German citizenship and was officially not a national of any nation until he became a Swiss citizen in 1901.

2. He married the only female student in the class

Mileva Marić is the only female student in Einstein's class at the University of Zürich. The girl has a great passion for mathematics and science, and the desire to become a physicist. However, she left her passion to marry Einstein, living her life as a wife and mother.

Einstein and his first wife, Mileva Maric.(Photo: TMSoNY).

3. The FBI keeps 1,427 pages of his documents

In 1933, the FBI began keeping abe documents, just before his third trip to the United States. This document of his 1427 pages focuses on his other interests, such as pacifism and socialism.

4. There is an illegitimate child

Eintein's future wife Mileva gave birth to a child in 1902 when he lived with her family in Serbia. The baby was born named Lieserl, many historians put the assumption that the baby was dead when he was a child, or was given up for adoption because he could not stand the rumors of people.

Lieserl's existence was not known until 1987, when the collection of Einstein's letters sent and received was published.

5. He donated all Nobel prize money to his first wife to divorce

Before receiving the Nobel Prize, Einstein gave all the expected bonuses of his prize to his first wife, Mileva Marić, after finishing, the wife agreed to a divorce. However, the prize was later increased to $ 32,250, ten times higher than the average annual salary of professors at that time.

6. Einstein married their sister

Elsa is Einstein's second wife, the daughter of Albert's mother. So Einstein and his second wife were cousins. In addition, Elsa's father and Einstein's father are also cousins. Elsa's maiden name is also Einstein.

Einstein's second wife is Elsa, her cousin sister.(Photo: LOC).

7. Civil rights activist

Einstein strongly supported citizenship and freedom of speech. When WEB Du Bois was prosecuted in 1951 on charges of being a non-registered resident in the host country, Einstein volunteered to defend him. After Du Bois's lawyer said that Einstein would appear in court, the judge canceled the trial.

8. Einstein's son was put in concentrated residences for the rest of his life

Einstein's second son, Eduard, was diagnosed with schizophrenia and placed in concentrated living places for others to take care of for the rest of his life.

Eduard was fascinated by psychoanalysis and was an avid fan of the famous psychologist Sigmund Freud. Although Einstein's father frequently exchanged correspondence, Einstein had never met his son again after he settled in the United States in 1933.

Eduard died at age 55 in a mental hospital.

9. Familiar friendship with the father of chemical warfare

Fritz Haber was a German chemist who helped Einstein to Berlin and then they quickly became close friends.

Albert Einstein after receiving the Nobel Prize in 1921. (Photo: LOC).

Haber was Jewish but converted to Catholicism, and analyzed Einstein much for assimilation before the Nazis came to power.

During World War I, Haber developed a deadly chlorine gas, heavier than air to spread into tunnels, causing pain to soldiers by burning their throat and lungs. From this invention, Haber is sometimes called the father of chemical warfare.