Steve Leonard explores the oceans & traces the story of life's origins from microbes to the the blue whale, the largest animal that ever lived.

Steve Leonard follows in the footsteps of the first pioneering animals to invade land, in an evolutionary journey that leads from a fish to a human.

Steve Leonard discovers how living things first grew wings and how all flying animals are descended from 4 ancestors that acheived the miracle of flight.

Steve Leonard asks whether its's the relationships between living things that have created so much of the spectacular variety of life we see today.

Steve Leonard asks how we came to be what we are by following in our ancestors' footsteps from chimp-like apes to modern humans.