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Crash Course
Bonding Models and Lewis Structures: Crash Course Chemistry
Models are great, except they're also usually inaccurate. In this episode of Crash Course Chemistry, Hank discusses why we need models in the world and how we can learn from them... even when they're almost completely wrong....
Howard Hughes Medical Institute
Great Discoveries in Science: The Double Helix
Take a trip with Watson and Crick as they struggle to determine the structure of the DNA molecule. In this beautiful documentary, biology students learn the history of this revolutionary discovery, and even hear from James Watson...