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Mammal success

Duration: 01:37

Without specialist clothing, the extreme cold of the high arctic would kill a human in minutes. The temperature drops to 50 degrees centigrade below zero, and yet there are animals that live here all the time. One such is the arctic fox. These mammals have adapted to living in these extreme environments, and being a mammal is a clear advantage. Mammals use their food to heat their bodies, they're warm-blooded, and have hair (or fur) to insulate them. Warm-bloodedness is one of the key factors that have enabled mammals to conquer the Earth and to develop one of the most complex bodies in the whole of the animal kingdom.

Available since: Fri 23 Oct 2009


Key talent
David Attenborough
Mike Salisbury
David Attenborough

This clip is from

The Life of Mammals A Winning Design

1/10 David Attenborough visits Australia and South America to study the lives of marsupials.

First broadcast: 12 May 2008

Image for A Winning Design Not currently available on BBC iPlayer

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