foto credits: Afbeelding van thara58 via Pixabay

How does a nose evolve into a blowhole? Study suggests there’s more than one way

Cetaceans, a group of marine mammals that includes whales and dolphins, evolved from ancestors that walked on land around 50 million years ago. Somewhere along the way, the forward-pointing nose shifted to an upward-pointing blowhole, making it easier for the animals to breathe air while swimming.

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