Do Dolphins Sleep? | Greg Foot Answers Your Question | Head Squeeze

As dolphins require air from the surface, how in the world do they sleep? Greg Foot answers all in this marine mammal Head Squeeze video answer. Subscribe: http://bit.ly/SubscribeToEarthLab

Part of Greg Foot Answers Your Questions. Thanks to James Squire for sparking this interesting question off on YouTube. If you have any more science based enquiries please leave them in the comments below.

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