/ Modified apr 23, 2014 3:12 p.m.

The Incredible Journey of the Butterflies

NOVA travels with Monarch butterflies on their annual 2,000-mile flight across North America. Wednesday at 9 p.m. on PBS 6.

Every year, 100 million Monarch butterflies set off on an incredible journey across North America.

nova_monarchs_resting617x347 Monarchs resting on a branch. (PHOTO: PBS)

These beautiful creatures fly 2,000 miles to reach their remote destination: a tiny area high in the mountains of Mexico. Yet scientists are still puzzling over how the butterflies achieve this tremendous feat of endurance — and how, year after year, the Monarchs navigate with such hair’s-breadth precision. As this program reveals, the Monarch is a scientific marvel locked in an inspiring struggle for survival.

[Nova: The Incredible Journey of the Butterflies], Wednesday at 9 p.m. on PBS 6.

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