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    Kelsey was named head of the agency's drug investigation division.
    0:24

    Kelsey was named head of the agency's drug investigation division.

     11.7K  views
    Kelsey isn't the only scientist to discover the risks of thalidomide.
    0:31

    Kelsey isn't the only scientist to discover the risks of thalidomide.

     8.24K  views
    In early 1961, doctors reported a number of cases of nerve damage.
    0:38

    In early 1961, doctors reported a number of cases of nerve damage.

     10.4K  views
    Merrell filed another application, and another, and another.
    0:33

    Merrell filed another application, and another, and another.

     10.3K  views
    Many experts believe that the placental barrier protects the fetus from harm.
    0:31

    Many experts believe that the placental barrier protects the fetus from harm.

     10.4K  views
    Today, the FDA classifies drugs according to their safety for the fetus.
    0:37

    Today, the FDA classifies drugs according to their safety for the fetus.

     10.3K  views
    In 1950, she received her Doctor of Medicine, her fourth and final degree.
    0:31

    In 1950, she received her Doctor of Medicine, her fourth and final degree.

     10.3K  views
    In the fall of 1960.
    0:32

    In the fall of 1960.

     10.3K  views
    As civilizations become more complex, new ways of doing things are needed.
    0:27

    As civilizations become more complex, new ways of doing things are needed.

     10.2K  views
    The village grew in size, eventually forming the first city.
    0:32

    The village grew in size, eventually forming the first city.

     9.96K  views
    A complex society. Without agriculture, they would not exist.
    0:32

    A complex society. Without agriculture, they would not exist.

     10.2K  views
    Along with agriculture came animals, and the animals settled in one place.
    0:32

    Along with agriculture came animals, and the animals settled in one place.

     10.2K  views
    We were still hunting and gathering, and we barely had time to invent anything.
    0:37

    We were still hunting and gathering, and we barely had time to invent anything.

     10.1K  views
    We talk about invention and innovation.
    0:33

    We talk about invention and innovation.

     10.2K  views
    If the Oxford comma were standard, you would notice its absence.
    0:43

    If the Oxford comma were standard, you would notice its absence.

     10.2K  views
    Over the years, the debate over the Oxford comma has stirred intense passions.
    0:36

    Over the years, the debate over the Oxford comma has stirred intense passions.

     10.2K  views
    If not, it's like being on your hapless invitation list.
    0:29

    If not, it's like being on your hapless invitation list.

     10.2K  views
    It has long driven grammar nerds crazy.
    0:34

    It has long driven grammar nerds crazy.

     10.2K  views
    Let's say you're helping a friend plan a party.
    0:37

    Let's say you're helping a friend plan a party.

     12.1K  views