A perfect planet

"The conditions of Earth are not just good for life, they are perfect. Everything about our planet - its size, its distance from the Sun, its spin and tilt, its moon - is perfectly suited to our existence, and our planet's forces serve to nurture its spectacular biodiversity. A Perfect Planet shows in stunning detail how Earth has always been more than the sum of its parts. Unlike any other astronomical body, it is a living world. Focusing on fou...