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  • Gorongosa's Water Cycle

    Gorongosa's Water Cycle

    Animation

    (2 min 15 sec) This animation illustrates the main stages of the water cycle in the setting of Gorongosa National Park.

  • Coral Bleaching

    Coral Bleaching

    Animation

    (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.

  • Dramatic Retreat of Arctic Sea Ice in 2012

    Dramatic Retreat of Arctic Sea Ice in 2012

    Animation

    (26 sec) Arctic sea ice melted on an unprecedented scale in 2012, opening up the fabled Northwest and Northeast passages.

  • The Geologic Carbon Cycle

    The Geologic Carbon Cycle

    Animation

    (6 min 20 sec) CO2 emitted by volcanoes into the atmosphere is removed by a series of chemical reactions related to rock weathering.

  • Greenhouse Effect

    Greenhouse Effect

    Animation

    (2 min 14 sec) Sunlight that warms Earth is re-emitted as infrared radiation, which is absorbed by greenhouse gases and causes further warming.