Jeffrey E. Epstein, the wealthy financier who is accused of sex trafficking, had an unusual dream: He hoped to seed the human race with his DNA by impregnating women at his vast New Mexico ranch. Mr. Epstein over the years confided to scientists and others about his scheme ... although there is no evidence that it ever came to fruition. Mr. Epstein, who was charged in July with the sexual trafficking of girls as young as 14, was a serial illusionist: He lied about the identities of his clients, his wealth, his financial prowess, his personal achievements. But he managed to use connections and charisma to cultivate valuable relationships with business and political leaders. He used the same tactics to insinuate himself into an elite scientific community. Mr. Epstein attracted a glittering array of prominent scientists. They included the Nobel Prize-winning physicist Murray Gell-Mann, who discovered the quark; the theoretical physicist and best-selling author Stephen Hawking; the paleontologist and evolutionary biologist Stephen Jay Gould; Oliver Sacks, the neurologist and best-selling author; George M. Church, a molecular engineer who has worked to identify genes that could be altered to create superior humans; and the M.I.T. theoretical physicist Frank Wilczek, a Nobel laureate. The lure for some of the scientists was Mr. Epstein's money. He dangled financing for their pet projects. Some of the scientists said that the prospect of financing blinded them to the seriousness of his sexual transgressions.