Season 1

1. Rain

2013-05-23 · 21m

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

2. Tsunamis

2013-05-23 · 21m

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

3. Gravity

2013-06-13 · 21m

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

4. Goldilocks

2013-06-20 · 21m

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.

5. Magnetic Shield

2013-06-27 · 21m

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.

6. Blizzards

2013-07-04 · 21m

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.

7. Tides

2013-07-18 · 21m

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."

8. Volcanoes

2013-07-25 · 21m

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

9. Strangest Places

2013-08-01 · 21m

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