David Attenborough's Natural Curiosities

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

Renowned wildlife filmmaker David Attenborough presents curiosities from the animal kingdom, from armored giants to crafty insects.

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?