Season 43 Episode 12

Mystery Beneath the Ice

Aired Wednesday 9:00 PM Jan 20, 2016 on PBS
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Episode Summary

A research mission to the Antarctica explores what may be behind the plummeting population of the krill, a transparent, shrimp-like creature that's an important cog in the Antarctic ecosystem. Since the 1970s, the krill numbers have declined, though no one knows why. One theory: the krill's life cycle is linked to the seasonal increase and decline of the Antarctic ice pack, which has been altered by climate change.moreless

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