Can Blind Birds Navigate? - Monthly Mailbag #8

Do birds needs eyes to navigate? Can pigeons use the Earth's magnetic field for homing? Jon answers questions from the comments.
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Check out the original talk by Jim Al-Khalili that sparked the question: https://www.youtube.com/watch?v=wwgQVZju1ZM&list=PLbnrZHfNEDZz256ho3Q4gt7YrF2xApo5g&index=154

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