All Episodes of Secrets of the Earth

Season 1

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  Rain

  Season 1 Episode 1 - Aired 5/23/2013

  Raindrops aren't only formed from condensed water vapor; some result from micrometeorites, and others deliver bacteria from the upper atmosphere.

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  Tsunamis

  Season 1 Episode 2 - Aired 5/23/2013

  Tsunamis form in the open ocean before making toward land. Science seeks not only to understand these giant waves but also predict them.

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  Gravity

  Season 1 Episode 3 - Aired 6/13/2013

  Earthquakes can actually affect Earth's gravity, and the ability of scientists to map gravitational fiels has uncovered mysterious anomalies.

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  Goldilocks

  Season 1 Episode 4 - Aired 6/20/2013

  Earth's distance from the sun is just right to sustain life, with neighbors Venus and Mars illustrating the impact of a slight difference in location.

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  Magnetic Shield

  Season 1 Episode 5 - Aired 6/27/2013

  A metallic core at the center of the Earth turns the planet into a magnet, generating a field that protects life on the surface from cosmic radiation.

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  Blizzards

  Season 1 Episode 6 - Aired 7/4/2013

  A visit to the researchers at a Colorado storm lab and an examination of lake-effect snow in northern New York reveal the science of blizzards.

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  Tides

  Season 1 Episode 7 - Aired 7/18/2013

  Water levels rise up to 50 feet at high tide in Canada's Bay of Fundy, while the Turnagain Arm in Alaska experiences 10-foot-high tidal "bore waves."

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  Volcanoes

  Season 1 Episode 8 - Aired 7/25/2013

  As evidenced by the 1815 eruption of Indonesia Mt. Tambora, volcanoes can profoundly impact the weather, producing lightning, ash and acid rain.

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  Strangest Places

  Season 1 Episode 9 - Aired 8/1/2013

  The world's most astonishing sites include extreme underwater ecosystems, steamy subterranean worlds and stratling igneous formations of lava rock.

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