On Monday, Hebrew University released a new batch of letters by Albert Einstein which sheds light on the love life of the great scientist.
The Jewish-German scientist, who gave us The Theory of Relativity, had nearly a dozen girlfriends and told his wife they showered him with "unwanted" affection.
Previously-released letters suggested Einstein's marriage in 1903 to his first wife Mileva Maric, mother of his two sons, was miserable. They divorced in 1919 and he soon married his cousin, Elsa. He cheated on her with his secretary, Betty Neumann.
Einstein is known to have had 10 lovers, in addition to the two women he married, according to Barbara Wolff, an archivist at the university's Einstein Archives.
As per the letters, Ethel Michanowski, a Berlin socialite, was involved with Einstein in the late 1920s and early 30s - going so far as to chase him to England, Wolf said. She was a friend of Einstein's stepdaughters, and was between 15 to 30 years younger than Einstein at the time of their affair.
The letter, which identified Ethel Michanowski and an other lady with their initials, only read, "It is true that M. followed me (to England) and her chasing after me is getting out of control," he wrote in a letter to Margot in 1931. "Out of all the dames, I am in fact attached only to Mrs. L., who is absolutely harmless and decent."
The other lady loves Einstein was involved with included a Margarete, an Estella, two Tonis and a Betty.
The more than 3,500 pages of correspondence were written between 1912 and 1955, the year Einstein died.
The letter revealed that Einstein lost much of his Nobel Prize money in the Great Depression but he was a more devoted father than previously thought and made no bones about discussing his romantic liaisons with his second wife.
In the early 1980s, Elsa's daughter, Margot, gave almost 1,400 letters to Hebrew University, which Einstein helped found. But Margot directed that the letters not be released publicly until 20 years after her death.
She died on July 8, 1986.