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  • Darwin the Entomologist

    Darwin the Entomologist

    Image of the Week

    As a student of divinity at Cambridge University, Charles Darwin was an enthusiastic collector of beetles

  • Animated Life: Seeing the Invisible

    Animated Life: Seeing the Invisible

    Animated Short

    (6 min 31 sec) This animated feature celebrates 17th-century citizen-scientist Antonie van Leeuwenhoek, whose discoveries of microbes changed our view of the biological world. Also available in Spanish.

  • Animalcules with Wheels

    Animalcules with Wheels

    Image of the Week

    Dutch draper Antonie van Leeuwenhoek (1632–1723) built microscopes that allowed him to observe never-before-seen microorganisms, including this rotifer. He called them “animalcules.”  

  • Wallace's Golden Birdwing Butterfly

    Wallace's Golden Birdwing Butterfly

    Image of the Week

    The golden birdwing provided a striking clue to the natural origin of species.