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Warm-bloodedness is one of the key factors that have enabled mammals to conquer the Earth, and to develop the most complex bodies in the animal kingdom. In this series, we will travel the world to discover just how varied and how astonishing mammals are.

— David Attenborough The Life of Mammals (2002)

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More quotes by David Attenborough

If we [humans] disappeared overnight, the world would probably be better off [making the point that the reverse is not true].

Right now we are facing a man-made disaster of global scale, our greatest threat in thousands of years: climate change. If we don’t take action, the collapse of our civilisations and the extinction of much of the natural world is on the horizon.

In moments of great grief, that's where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

We must change our diet. The planet can’t support billions of meat-eaters.

Trade is a proper and decent relationship, with dignity and respect on both sides.

A Blank on the Map (1971)

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Attribution

Quote text and notes from Wikiquote: David Attenborough (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.