Why life might be widespread in the universe -- Habitable zones of the universe -- Building a habitable Earth -- Life's first appearance on Earth -- How to build animals -- Snowball Earth -- The enigma of the Cambrian explosion -- Mass extinctions and the Rare Earth Hypothesis -- The surprising importance of plate tectonics -- The Moon, Jupiter, and life on Earth -- Testing the Rare Earth Hypotheses -- Assessing the odds -- Messengers from the stars.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.