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S31 E7 Magnetic Storm

本集简介

Is the magnetic field protecting Earth from deadly radiation about to reverse direction or even disappear?

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2003/11/11 S31 E6

Wright Brothers' Flying Machine

Relive the engineering challenges that two obscure bicycle makers overcame to become first in flight.

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2003/11/18 S31 E8

Volcano Above the Clouds

Join a scientific expedition to the glacier-capped summit of Kilimanjaro, Africa's tallest mountain.

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