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It's Okay to Be Smart

The Largest River On Earth Is In The Sky

Season 5 Episode 39 | 5m 30s

What’s the largest river on Earth? If you said “the Amazon”… you’re only half right. Scientists have discovered an even bigger river in South America, and it’s in the sky above the Amazon rainforest. Turns out, this sky river is the reason there’s a rainforest at all…

Aired: 10/24/18

Rating: NR

Video has closed captioning.

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