81.   Scientists think they form in a couple of ways.

82.   Scientists think they may be able to make real spare parts for people some day.

83.   Scientists think this often occurs when a flu virus from a bird and one from a human simultaneously infect a pig.

84.   Some people feel such research is inherently unethical, while many scientists think it has been needlessly curtailed.

85.   Some scientists think a pesticide may be to blame for some cases of neuroblastoma, but like all the other theories, the link is tenuous.

86.   Some scientists think the harm done to your skin by tanning beds may actually be worse than that caused by sun exposure.

87.   Some scientists think they may soon have a device - the magnetic resonance force microscope - that can feel inside a molecule and label each and every atom.

88.   Some scientists thought the animals might have been having sex behind their backs.

89.   Some scientists thought they saw evidence of old coastlines in photographs taken by the spacecraft.

90.   Some scientists think Hollywood is guilty of poor casting.