Soar and glide | Secrets of Bones
While pigeons have adapted to be all rounders, other birds have adapted to be able to execute specialised forms of flight.
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How fossils and living animals provide links between animal groups | Charles Darwin and the Tree of Life
Passionate Darwinian David Attenborough looks at the evidence for evolution provided by fossils and living species which show the links between different animal groups.
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Psychologist Kimberley Wilson and Dr Xand van Tulleken take a journey through the body's immune system and profile a remarkable white blood cell.