America's Best: Science and Medicine

In the second installment of America's Best, CNN and TIME looked at the brilliant individuals, combining passion and obsession, who are still pushing the boundaries of of science and medicine, often by questioning or ignoring the conventional wisdom. CNN Presents profiled pediatric neurosurgeon Ben Carson, AIDS researcher Anthony Fauci, neurobiologist Patricia Goldman-Rakic, paleontologist Andrew Knoll and climatologist Lonnie Thompson.