Episode Guide:
Origins- What was the first animal and how do we know?
Life on move- How did animals begin to move? Are the descendants of these first movers alive today?
The first hunter - What animals were the first to hunt? Do you need a head to get ahead?
The Conquerors - How did animals move from the ocean to land? Why are more than 80% of living species arthropods?
Survival Game - What is the purpose of sea shells? How did the struggle for survival lead to animal diversity?
Ultimate Animals - Is one type of animal better than the rest? Can you have social behavior without a brain?
Explosion of Life -What caused the rapid appearance of new kinds of animals 520 million years ago?
Bones,Brawn & Brains -How do humans fit into the shape of life? Why have animals with backbones enjoyed such success?