Alexander Moszkowski
![Alexander Moszkowski](https://upload.wikimedia.org/wikipedia/commons/e/e4/Alexander_Moszkowski.jpg)
He was a friend of many celebrities in Berlin, among them the theoretical physicist Albert Einstein, about whom he was the first to publish a book in the summer of 1920 and consequently popularize the theory of relativity. In his autobiography he wrote: "At the beginning of the 20th century the question of the conceivability of other worlds with modified physics and mathematics will be highly employed." Provided by Wikipedia
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