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Forces of Nature: Elements

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“Elements” – The forces of nature make Earth a restless planet, but they also turned our ball of rock into a home for life. How did our planet's ingredients, the chemical elements, come together and take that first crucial step from barren rock to a living world? (Also Fri. 9/23 at 2 a.m.; Sat. 9/24 at 6 p.m.; Sun. 9/25 at 3 p.m.)

Aired: 09/21/16 | Expired: 09/23/16 | Rating: NR

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