The
Cycles of Life series examines biological organisms interacting with their environments and other forms of nature, using the scientific method as a learning tool whenever new topics are addressed. This episode looks at the fragile nature of most ecosystems and specific parts of the crust, atmosphere, and waters of the Earth's biosphere. Microvideography, 3-D animations, and special laboratory footage help bring each subject into focus throughout this series. ~ Elizabeth Smith, All Movie Guide