Known Universe

Season 2 Episode 5

Final Frontiers

Aired Sunday 5:00 PM May 06, 2010 on National Geographic
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Episode Summary

More than 70 percent of Earth is covered in water, but we've only explored roughly 5 percent of it. We've roamed even less of our solar system. Until recently, scientists haven't had the tools necessary to traverse either of these alien environments. Now, armed with some of the latest advances, we join scientists on a voyage into the unknown -- from the far reaches of space to the extreme depths of our oceans -- where new discoveries have experts questioning everything we know about the universe, and ultimately ourselves.moreless

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