Forces of Nature: Elements
Preview | 30s
“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
