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Science Clips Investigates Keeping Healthy Clips

  1. Edward Jenner - the discovery of smallpox vaccine (signed)

    Duration: 03:15

  2. Edward Jenner - the discovery of the smallpox vaccine

    Duration: 03:15

  3. Does eating breakfast affect concentration? (signed)

    Duration: 04:50

  4. Does eating breakfast affect concentration?

    Duration: 04:50