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  • A Predator in the Plankton

    A Predator in the Plankton

    Image of the Week

    The comb jelly (Beroe cucumis) uses its large mouth and cilia-powered motor to prey upon members of the plankton family, including other ctenophores.

  • Life and Pi

    Life and Pi

    Image of the Week

    Many groups of organisms, including some diatoms, are radially symmetrical, and look like circles when seen end on. 

  • Coral Bleaching

    Coral Bleaching


    (3 min 48 sec) Zoom into a coral reef and discover photosynthetic algae inside the coral’s cells. Reef-building corals rely on these symbionts for their survival.

  • Secret of Coral-Reef Survival

    Secret of Coral-Reef Survival

    Image of the Week

    Reef-building corals depend on brown-colored symbiotic algae for survival.

  • 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.

  • Malaria: Mosquito Host

    Malaria: Mosquito Host


    (3 min 59 sec) A mosquito becomes infected with malaria when it sucks the blood from an infected human. Once inside the mosquito, the parasites reproduce in the gut and accumulate in the salivary glands, ready to infect another human host with the next bite.

  • Malaria: Human Host

    Malaria: Human Host


    (4 min 18 sec) When a malaria-carrying mosquito bites a human host, the malaria parasite enters the bloodstream, multiplies in the liver cells, and is then released back into the bloodstream, where it infects and destroys red blood cells.

  • 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.

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