An Original Signed Paper by Isaac Asimov. In an unknown hand the name of Werner Karl Heisenberg who was a famous German theoretical physicist and one of the key pioneers of quantum mechanics. Dated 1976. Isaac Asimov 1920 – 1992 was an American writer and professor of biochemistry at Boston University. During his lifetime, Asimov was considered one of the "Big Three" science fiction writers, along with Robert A. Heinlein and Arthur C. Clarke. A prolific writer, he wrote or edited more than 500 books. He also wrote an estimated 90,000 letters and postcards. Best known for his hard science fiction, Asimov also wrote mysteries and fantasy, as well as much nonfiction. His most famous works being Foundation series and I Robot. Size is 127mm x 78mm. Condition is good.