Why do horses go "neigh!" when donkeys "he-haw!"?  And what noize do zebras make?  Just because they look similar, should they sound the same?  Plus, we ask how food alters the smell of your urine...

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• Sounds of the Stables - Why don't donkeys sound like horses? - Naked Scientists Science Podcasts and Science Radio Shows
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• Dead horse in Pompeii was actually a donkey. - Interviews
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• Why do some foods make our urine smell? - Podcasts