CBC North - Photo By Lena Autut

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Unlocking the monarch migration mystery

It's one of the great mysteries, and wonders, of the natural world; why do tens of thousands of monarch butterflies migrate from Canada to one forest in Mexico every year?

The question has bedevilled scientists for years, but some researchers think they may soon be able to uncover the answer.

Click on the link below to hear Airplay's science columnist Michael Bhardwaj speak with Dave.

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