Amoco Production Co. v. Hodel

noting that to defeat summary judgment, expert affidavits cannot involve "mere speculation or idiosyncratic opinion" | substantial segment of scientific community relies on animal studies in assessing health risks in humans | Testimony by experts as to causation lacked a sufficient foundation where the experts failed to take into account plaintiffs’ specific medical histories and habits; court also based its decision on the fact that the experts failed to rule out other possible causes. | Testimony by experts as to causation lacked a sufficient foundation where the experts failed to take into account plaintiffs' specific medical histories and habits; court also based its decision on the fact that the experts failed to rule out other possible causes. | expert opinions cannot involve "mere speculation or idiosyncratic opinion”