Professor Brian Cox travels to the richly bio-diverse areas of Southern Africa and Madagascar and asks why is it that the Earth is so fertile and life is so diverse. He searches for clues by considering the chemistry of a lion. The answer, he reveals, lies, in part in carbon. It’s a universal building block forged by the stars that is captured by the living world. By following the stellar origins of carbon and the universality of the laws of nature, Brian contemplates whether there could be similar life elsewhere in the universe.