Introduction : What is evolution?
A timeline of life on Earth
Working out the evolutionary tree
Nature's big experiment
When fins became feet - When lizards went back into the water
When reptiles grew wings
When crocodiles ruled the world
When snakes had legs
When birds had teeth
When whales walked on land
When rhinos grew huge
When elephants were tiny
When birds stopped flying
When mammals began to hunt
When primates came down from the trees
Evolution continues.