Do All Animals Need Sleep? -You Asked #4 – Earth Unplugged04:33

Published on April 3, 2017

You sent questions, we answered. This time you asked – ‘Do all animals need to sleep?’, ‘What is a narwhal’s horn for?’ and ‘How does a snake produce its venom?’ Well the first two of those are actually pretty tricky, but we love a challenge so we do our best to answer it! Keep the questions coming!

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