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Season 1, episode 7. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.
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Rivers: Friend and Foe
Rivers provide the essentials of life: fresh food and fresh water. They act as natural highways and enable humans to live in just about every environment on Earth. Rivers are not to be taken for granted, however, as they freeze, flood, and sometimes dry up - disappearing entirely!
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Episode 1: Oceans: Into the Blue
Episode 2: Deserts: Life in the Furnace
Episode 3: Arctic: Life in the Deep Freeze
Episode 4: Jungles: People of the Trees
Episode 5: Mountains: Life in Thin Air
Episode 6: Grasslands: Roots of Power
Episode 7: Rivers: Friend and Foe
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Episode 8: Cities: Surviving the Urban Jungle