David Attenborough's Natural Curiosities

Season 4 Episode 5: Incredible Shells

David Attenborough investigates two shells that have proved to be winners in evolution: the bird’s shell and the hard shell of the tortoise. The ostrich egg is so strong it’s possible for a person to stand on it without it breaking – how does the chick break out of this fortress? The evolution of the tortoise shell was for a long time a mystery and this bony box offers a lot more than just protection.

Genre:

Documentary

Seasons:

4

Episodes:

27

Cast:

David Attenborough

Quality:

HD

Duration:

30 min

First Air:

2013

Rating:

7.3