Why do dolphins have to hold their breath?

Matthew Chatfield

This splendid infographic by Justin Stuart summarises the development of modern dolphins from earlier land mammals, and answers some great questions such as why dolphins have the genes to smell things on land, but not in the water.

Why do dolphins have to hold their breath? (c) Justin Stuart
(c) Justin Stuart

Matthew Chatfield

Uncooperative crusty. Unofficial Isle of Wight cultural ambassador. Conservation, countryside and the environment, with extra stuff about spiders.

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