Caption: Calving the Southern Ward Hunt Ice Shelf into Disraeli Fjord, Ellesmere Island, August, 2008, Credit: Credit: Denis Sarrazin, ArcticNet/Centre d'Etudes Nordiques
Image by: Credit: Denis Sarrazin, ArcticNet/Centre d'Etudes Nordiques 
Calving the Southern Ward Hunt Ice Shelf into Disraeli Fjord, Ellesmere Island, August, 2008 

Ice- Part One

From: Canadian Broadcasting Corporation
Length: 00:53:53

For more than four billion years, ever since comets first crashed into the Earth, ice has been inextricably linked to life on this planet. From cold-hardy microbes to freeze-resistant frogs, nature has evolved many tricks for survival. Even human beings have learned to adapt to the challenges – and opportunities – of life with ice. Now, as glaciers shrink and ice vanishes from the polar seas, Richard Longley takes us back to our icy roots, rekindling wonder for this alluring frozen water. Read the full description.
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Piece Description

Episode 1 - Ice and the Evolution of Life on Planet Earth

In the beginning, there was no ice and certainly no life on the Earth. This newborn planet was churning and searing hot, far too hot for ice, or even liquid water. But as the dust settled, and the heat began to subside, ice arrived on earth with a bang!

The oldest relics of life on earth, aside from some traces of chemicals, are fossils of single cell microbes. They’re found locked in rock from the Pre Cambrian Era, dating back more than three billion years. Today, in the Arctic and Antarctica, the coldest places on earth, microbes that look very similar flourish in those icy worlds.

The Cyanobacteria are especially dazzling. “Cyano” means blue in Greek which is why they’re are also known as Blue Green Algae.

About 2 million years ago, The Pleistocene Era was about to begin and the Earth was looking much more like the world we live in today. There were flowers, grasses and trees, reptiles, and fish, insects, birds and mammals, including apes who were the ancestors of us Humans.

These primates lived in Africa, as Hunter Gatherers. But they weren’t the only apes in Africa at that time. There were also refugees from Europe and Asia who’d escaped the Ice Sheets that were creeping South. And it wasn’t only Eurasia that was covered in ice. Much of North America was too.

When we think about that period today, we call it The Ice Age. Towards the end of the Ice Age, some of our tropical ancestors moved into Europe, and into the cold. They had the brains to survive - and thrive - in hostile environments their bodies weren’t really built for.

Around 25,000 years ago, the last big freeze-up of the Pleistocene Ice Age was drawing to a close. The Earth was heading towards the warm Interglacial Period that we’re living in today. Eventually, even the Americas were occupied by Humans.

Broadcast History

This is the first part of a two part documentary that originally aired on the program Ideas on the Canadian Broadcasting Corporation on December 1, 2008.

Intro and Outro

INTRO:

And now the first of two hours about ice- its history, the science behind it and the atory of how people have reacted and interacted with it. It first aired on the program Ideas on the Canadian Broadcasting Corporation, and it's introduced by Paul Kennedy.

OUTRO:

In Praise of Ice, part one, first aired on the program Ideas on the Canadian Broadcasting Corporation in December 2008.

Related Website

http://www.cbc.ca/ideas/features/ice/index.html