1) Apogees and nadirs 2) Guinness data 3) Immoderation 4) Maximum and minimum 5) North and south 6) Opposite ends of the spectrum 7) Opposite poles 8) People sometimes go to them 9) Polar opposites 10) Tails of the spectrum 11) The ends of the earth, eh 12) Unrestrained behaviour 13) Utmost lengths 1) Ends