The remarkable and often perilous story of the journey through life. It is a story that unites each of us with every animal on the planet, because we all set out on this journey from the moment we are born. For animals there is just one goal in life - to continue their bloodline in the form of offspring. This series follows that journey through its six crucial stages: first steps, growing up, finding a home, gaining power, winning a mate and succeeding as a parent.