Explorers who dread spiders and snakes prove that heroism is always more heroic to outsiders. Then there's the case of the first space pilot to Mars who developed the itch— Bill Adams was halfway back from Mars when he noticed the red rash on his hands. He'd been reaching for one of the few remaining tissues to cover a sneeze, while scratching vigorously at the base of his neck. Then he saw the red spot, and his hand halted, while all desire to sneeze gasped out of him. He sat there, five feet s