71.   There must be clues and the puzzle is solved by ratiocination, some cerebral thought.

72.   There is no official list of hints or clues to help users solve the puzzle.

73.   They answer questions and solve puzzles.

74.   They have two weeks to solve the puzzle.

75.   They solve a puzzle posed by the otherworldly beings, and then one of the astronauts opts for a rebirth that will presumably begin the life cycle again.

76.   They share the mindset that drives a person to stay up all night to solve the puzzle of a few buggy lines of programming code.

77.   Those who solve this puzzle in the shortest times are eligible for awards.

78.   This fly, though, can perform the requisite adventure-game tasks of carrying items from place to place, solving puzzles and generally saving the world.

79.   This year, though, it appears there is finally a workable theory for solving the puzzle about just what makes the Great White Shark run.

80.   To solve the puzzle, the two teams have set aside their zest for competition, their fear of ridicule, and instead are pooling their findings.