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This product uses TMDB and the TMDB APIs but is not endorsed, certified, or otherwise approved by TMDB.
United States
Humans have always been interested in the workings of planet Earth and high tech is giving them all sorts of new insights. Did you know that Earth's magnetic poles have shifted dozens of times during the planet's history? Host Chuck Pell visits scientists who've created a huge device that shows how this happens and predicts when it will happen again.
