Podcasts on the Immortal Life of Henrietta Lacks:

Biology Topics
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The Global Race for Stem Cell Therapies
   Part 1: An overview that poses the question-should the US be conducting more research on stem cells.
   Part 2: An overview of Britain
   Part 3: An overview of China
   Part 4: An overview of Israel

Chemistry Topics

Physics Topics
Astrophysicist Neil deGrasse Tyson from the American Museum of Natural History offers his take on Einstein's famous equation.

General Science Topics