David Attenborough's Natural...

BBC TWO

Monday 15 April 2019  19:00 - 19:30 (30 mins)
...Curiosities. 5/6. David Attenborough investigates two shells that have proved to be winners in evolution: the tortoise's shell and the shells of birds' eggs. [S,AD]

David Attenborough's Natural... may be available on playback
David Attenborough's Natural... (BBC TWO) Monday 15 April 2019 19:00 - 19:30