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Cracking The Ice Age (#2320)

This episode explores a new path of inquiry into the cause of the Ice Age. Since the planet formed about 4.5 billion year ago, the climate has been predominantly hot, the land covered with lush, tropical rainforest. No ice existed on the planet, even at the poles. 40 million years ago, so much ice formed that the sea level dropped 400 feet. Previously it had been thought that changes in the earth's orbit accounted for the Ice Age. But as scientists continue to look for the cause of such an abrupt cooling of the earth, they have begun to look toward geological explanations. This program follows a team of scientists to the Tibetan plateau as they look for answers in the Himilayan mountains, the earth's most prominent geological formation. [56 minutes] Closed Captioning

This episode has not aired in the past few months on Iowa Public Television.

PBS Video

Information For Teachers

Grade Levels
6-8, 9-12
Curricular Areas
Science & Technology
Series Length
440 episodes
Average Episode Length
61 minutes
Record Rights
Record and retain for 1 year from each broadcast. No duplication allowed.
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Series Description: PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA programs demystify science and technology and highlight the people involved in scientific pursuits.

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These episodes of NOVA aired in the last few months on Iowa Public Television.

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