WEBVTT

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(MUSIC)
Joan Cartan-Hansen, Host:

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Humans aren't the only ones
who use magnets and magnetism

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to help find their way around.

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Hammerhead sharks have
receptors in their heads to

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help them sense the earth's
magnetic fields that helps

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them to navigate.

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Trout have cells lining their
noses that do the same thing.

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A number of birds have a
protein in their eyes that

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scientists think helps them to
see magnetic fields, so they

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know where to travel over long
distances.

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Cows apparently sense the
earth's magnetic fields too.

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They often line up their
bodies up facing north or

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south When grazing or
resting.

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And, under calm magnetic field
conditions, dogs poop along

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magnetic lines.

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Scientists call this ability
magnetoreception and they

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still don't know how it all
works.

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Or, maybe, if humans have this
ability too.

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For more information about
magnets and magnetism, check

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out the science trek website.

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You'll find it at
idahoptv.org/science trek