Bitesize Articles.

You would not expect whales to be friends with lice, but researchers now suggest these two animals have a very special and important relationship that benefits both the giant and the small.

Whilst sleeping can be the easiest thing in the world for most people, sleeping for animals can sometimes provide unique challenges. Marine mammals need to breathe air during the night but they have to stay under the ocean's surface, so how do they do it and still get a good nights kipper?

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