The Incredible Journey of the Butterflies

Season 36 Episode 1 | 52m 17s | Video has closed captioning.

Follow the 2,000-mile migration of monarchs to a sanctuary in the highlands of Mexico.

Aired: 01/27/09

Expired: 12/15/15

Rating: TV-G

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Funding for NOVA is provided by David H. Koch, the Corporation for Public Broadcasting and PBS viewers. Original funding provided by Exxon Mobil, Pacific Life, the David H. Koch Fund …

Funding for NOVA is provided by David H. Koch, the Corporation for Public Broadcasting and PBS viewers. Original funding provided by Exxon Mobil, Pacific Life, the David H. Koch Fund for Science, HHMI, the Corporation for Public Broadcasting, and PBS Stations.

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