The world’s biggest butterfly migration

Today's story: Monarch butterflies migrate thousands of kilometers from across the U.S. and Canada to just a few mountain forests in central Mexico. They rely on the sun, the Earth’s magnetic field, and a unique multi-generational life cycle to complete the journey. But their numbers are falling due to habitat loss and climate change.

Transcript & Exercises: https://plainenglish.com/822

Full lesson: https://plainenglish.com/822

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