Professor Bachusrand wrote, “=42” on the wall. He stopped and looked at what he had written. Then he rappelled down the inside wall of the tall tower, where he had been working on his equation. When he reached the bottom, the old lizard celebrated by running around in circles, jumping up and down, and singing. “The answer is 42 . . . the answer is 42. Whoo-Hoo the answer is 42,” sang Professor Bachusrand. Students and fac...