11.   The problem, researchers say, is that molecular studies keep coming up with ages that are inexplicably older compared with the fossil record.

12.   --John Ross, chemistry professor at Stanford University, for his work in molecular studies, statistical mechanics and nonlinear kinetics.

13.   Shope added that molecular studies, which track a particular strain of HIV virus, are necessary to show conclusively that migrant workers are spreading the disease.

14.   Six months into the trial, molecular studies showed the virus had started mutating the gag gene in the vaccinated monkey.