American Masters

DNA Discoveries Before Watson and Crick

James Watson and Francis Crick discovered DNA’s structure in 1953, but other scientists paved the way for them. Swiss chemist Friedrich Miescher isolated DNA in 1869, testing cell nuclei in pus. In 1944, Oswald Avery, Colin MacLeod and Maclyn McCarty’s study of pneumonia bacteria provided definitive evidence that DNA was the molecule of heredity.

DNA Discoveries Before Watson and Crick

3m

  • Daniel K. Inouye: Life of Service [Extended Audio Description + OC]: asset-mezzanine-16x9

    Daniel K. Inouye: Life of Service [Extended Audio Description + OC]

    15m 31s

    This version contains extended audio description and large open captions. Explore the story of the U.S. Senator for Hawai’i who was injured in battle during World War II, resulting in the amputation of his right arm. Inouye championed the cause of justice and equality for all Americans, including people living with disabilities.

  • Daniel K. Inouye: Life of Service: asset-mezzanine-16x9

    Daniel K. Inouye: Life of Service

    12m 41s

    Explore the story of the U.S. Senator for Hawai’i who was injured in battle during World War II, resulting in the amputation of his right arm. Posthumously awarded the Presidential Medal of Freedom for his lifelong public service, Inouye championed the cause of justice and equality for all Americans, including people living with disabilities.

  • Daniel K. Inouye: Life of Service [ASL + OC]: asset-mezzanine-16x9

    Daniel K. Inouye: Life of Service [ASL + OC]

    12m 41s

    This version contains on-screen ASL interpretation and open captions. Explore the story of the U.S. Senator for Hawai’i who was injured in battle during World War II, resulting in the amputation of his right arm. Inouye championed the cause of justice and equality for all Americans, including people living with disabilities.

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