Aired: 4/14/2005
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.
Aired: 4/21/2005
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.
Aired: 4/28/2005
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.
Aired: 5/5/2005
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.
Aired: 5/12/2005
Steve Leonard asks how we came to be what we are by following in our ancestors' footsteps from chimp-like apes to modern humans.
