The description reads:
On Nov. 12, 1971, on the eve of Mariner 9 going into orbit at Mars, Bradbury took part in a symposium at Caltech with Arthur C. Clarke, journalist Walter Sullivan, and scientists Carl Sagan and Bruce Murray. In this excerpt, Bradbury reads his poem, "If Only We Had Taller Been."
He passed away on June 5th, 2012, at the age of 91. He was a science-fiction author famous for a variety of works, including Fahrenheit 451.