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  • Origins of Antibiotic Resistance

    Origins of Antibiotic Resistance

    Data Point

    Scientists collected bacteria from locations that had never been exposed to humans or modern antibiotics to determine if antibiotic resistance is newly evolved since the introduction of antibiotics or has evolved independently.

  • Vertebrate Circulatorium

    Vertebrate Circulatorium

    Click & Learn

    Compare and contrast the anatomy of the heart and the circulatory systems of major vertebrate groups and gain insights into their evolution.

  • Weighing the Evidence for a Mass Extinction—On Land

    Weighing the Evidence for a Mass Extinction—On Land


    A lesson in which students analyze graphs and data on pollen grains and fern spores to form a picture of the living landscape before and after the K-T mass extinction.

  • Foraminifera—Earth's Microscopic Recordkeepers

    Foraminifera—Earth's Microscopic Recordkeepers


    A poster from the 2012 Holiday Lectures on Science, Changing Planet: Past, Present, Future. It details the importance of foraminifera, known as "forams" for short, in discovering significant changes in Earth's past. 

  • Weighing the Evidence for a Mass Extinction—In the Ocean

    Weighing the Evidence for a Mass Extinction—In the Ocean


    A hands-on activity in which students see first-hand the difference in foraminifera fossils below and above the K-T boundary. Also available in Spanish.

  • From Butterflies to Humans

    From Butterflies to Humans


    (58 min 30 sec) How and why butterflies and fruit flies got their spots, and the fossil record for human evolution.

  • Stickleback Environment

    Stickleback Environment


    (1 min 27 sec) At the end of the ice age, the retreating ice sheet created many new lakes, some of which were colonized by sticklebacks.

  • Emerging Infections: How Epidemics Arise

    Emerging Infections: How Epidemics Arise


    (59 min) Dr. Ganem analyses the complex causes of epidemics—how changes in the environment and in human social behavior can give rise to new infectious diseases.

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