WEBVTT

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(Music)
Joan Cartan-Hansen, Host: How

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are dogs and cats ears
different than humans?

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Dog ears are controlled by up
to 18 muscles, while human use

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only six.

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All those muscles help dogs
better find the location of a

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sound, hear it more clearly
and from farther away.

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A cat's hearing is even better
than a dogs.

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Cats can hear a wider range of
sounds and have 30 ear muscles

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especially designed to help
them figure out what different

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sounds are.

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Birds don't have external
ears, just openings.

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Their heads are shaped to
direct sound into their inner

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ears.

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Snakes don't have ears like us
at all.

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They feel vibrations and
that's how they detect sound.

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Some fish also detect sound
through vibrations but their

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ears are on the inside.

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Bony fish detect vibrations
through their earstones called

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otoliths,
but both fish and mammals use

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their ears to help with
balance.

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So that's something we have in
common.

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For more information about
hearing, check out the science

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trek website.

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