大象传媒

As the coal forests were taking root the creepy crawlies - the arthropods - were thriving. Scorpions reached anything up to a metre long. A hard protective skeleton brought with it weapons. It allowed to control of water loss and the control of life on land for many millions of years. But somewhere, our ancestors - the backboned amphibians - were competing hard. By chance, one creature sent us a postcard of itself. Known as 'Lizzie the Lizard' she made her own crucial move in the evolution stakes. She was no longer tied to a particular pool. Instead she made her own - the egg. Evolution went to work on an egg and gave us dinosaurs, and their feathered descendants, the birds.