51.   Cmdr. Gordon Hume said Saturday morning that divers were expected to end their three-month search of the ocean floor either Saturday night or Sunday.

52.   Despite their physical weakness, much of the life that exists down below on the ocean floor may depend on them.

53.   Divers had to be debriefed after every trip to the ocean floor.

54.   Divers, who had been expected to begin their search for debris on the ocean floor, were unable to get into the water.

55.   Dig deep under the ocean floor for new sources of oil?

56.   Each zone contains a science experiment, such as determining how a wave changes shape depending on the angle of the ocean floor.

57.   Enter surface-dwelling, plankton-eating, gut-carrying animals and their fecal pellets, which dropped quickly to the ocean floor.

58.   Even after the reef idea was broached, finding a nice stretch of ocean floor for the cars was not easy.

59.   Extreme athletes test their mettle by jumping out of planes, soaring off mountains, diving to the ocean floor, racing down hills, and climbing rock faces.

60.   Fanned out or shingled, the tournedos of beef hugged the plate like a stringray hovering over the ocean floor.