Gravity • 2013 • episode "S1E5" Secrets of the Earth

Category: Environment
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NASA satellites have mapped Earth's gravity and discovered mysterious spots where gravity is weaker; how earthquakes change the planet's gravitational field.

Secrets of the Earth • 2013 • 8 episodes •

Rain

Scientists are just now unlocking the amazing secrets of how rain is made; some raindrops form around micrometeorites from outer space, others are created by bacteria that float into the upper atmosphere.

2013 • Environment

Tsunamis

Which places on earth are poised to generate the next mega-tsunamis and the science of what happens as the wave emerges from open ocean and bears down on land.

2013 • Environment

Tides

Explore what drives the strange science behind places like Canada's Bay of Fundy-where water levels rise as much as 50 feet during high tide, and Alaska's Turnagain Arm, where 10-foot tall "bore waves" routinely wash in from the sea.

2013 • Environment

Volcanoes

Volcanoes have incredible effects on the weather; eruptions create localized weather phenomena like acid rain and violent volcanic lightning.

2013 • Environment

Gravity

NASA satellites have mapped Earth's gravity and discovered mysterious spots where gravity is weaker; how earthquakes change the planet's gravitational field.

2013 • Environment

Goldilocks

Venus and Mars show how inhospitable Earth could have been if things were just a little bit different.

2013 • Environment

Magnetic Shield

Earth's metallic core makes the planet a huge magnet, generating a magnetic field that protects us from dangerous cosmic rays and solar energy.

2013 • Environment

Blizzards

Blizzards; it's one of the Earth's most beautiful secrets until it turns into a storm that can bring entire cities to a grinding halt.

2013 • Environment

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Oceans

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The Census of Marine Life - a ten-year effort by scientists from around the world to answer the age-old question, "What lives in the sea?" It was an international effort to asses the diversity, distribution, and abundance of marine life in our ocean, and the project offically concluded in October 2010.

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Part 3

In the final episode of the series, Anita Rani investigates the tsunami of single-use plastic that parents pick up in the form of give-away toys. It turns out that McDonald's are the largest toy distributor in the world, handing out over 1.4 billion plastic toys per year worldwide. They claim on their website that they are recyclable, but a visit to Simon Ellin, the CEO of the Recycling Association, makes it very clear that while that may be true in theory, in reality it’s not that simple. Meanwhile, Hugh is in Scotland. He’s learnt that at the same time as the public are trying to reduce the amount of plastics in their lives, the plastics industry has big plans to increase plastic production by 50% before 2040. To find out more, he visits the INEOS factory in Grangemouth, owned by the richest man in Britain, where they produce a staggering 60-70 billion tiny plastic pellets every day.

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