David Attenborough's Natural Curiosities S04E05 · Incredible Shells

Overview

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.

Torrents

Subtitles

Episodes

1. 1 1. Animal Frankensteins2017-06-11 · 22mHybrids can be bizarre and they can be deadly. We look at two hybrid animals that owe their existence to human interference – the pizzly bear (a cross between a polar bear and griz
2. 2 2. Finding the Way2017-06-11 · 30mSome animals have an extraordinary ability to find their way. The dung beetle, an insect revered by ancient Egyptians, uses the sun, the moon and even the Milky Way to move its pr
3. 3 3. Extreme Babies2017-06-18 · 30mThe giant panda gives birth to the smallest baby of any mammal and has to care for and protect it for many months. The kiwi lays one of the largest eggs in the bird world, which pr
4. 4 4. Curious Counters2017-06-18 · 30mCan animals count? This is a question that has intrigued and fooled investigators for a long time. Just over a hundred years ago, a German horse called Hans was declared a mathemat
5. 5 5. Incredible Shells2017-06-25 · 30mDavid 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 poss
6. 6 6. Ferocious Fighters2017-06-25 · 30mThe Siamese Fighting Fish is so aggressive it will fight its own reflection until it is exhausted. Recent research shows that the fighting behaviour varies and depends on the perso