81.   The NTSB was testing a theory that someone might have gone through a weak spot in the floor of the cabin and stepped on a cable.

82.   The new knowledge is enabling scientists to test their theories and conduct increasingly detailed computer simulations of cosmic history, including the dark age.

83.   The purpose of the hexamethonium experiment was to test a theory held by Togias and a few colleagues about what happens in an asthma attack.

84.   The next week or two will test that theory.

85.   The researchers are testing this theory.

86.   The reductions were an experiment to test the theory that cuts in benefits would encourage welfare recipients to work.

87.   The team tested the theory by first checking the neural response of lesser yellow underwing moths, Noctua comes, to the ring sounds.

88.   The Yankees take their first step toward testing that theory Tuesday afternoon.

89.   Then, as with any medical condition, public health authorities could begin to test their theories.

90.   They also relate how these theories are being tested.