The Call of Distant Mammoths: Why the Ice Age Mammals Disappeared

Under a Green Sky: Global Warming, the Mass Extinctions of the Past, and What They Can Tell Us About Our Future

Life as We Do Not Know It: The NASA Search for (and Synthesis of) Alien Life

Out of Thin Air: Dinosaurs, Birds, and Earth's Ancient Atmosphere

Lamarck's Revenge: How Epigenetics Is Revolutionizing Our Understanding of Evolution's Past and Present

The Medea Hypothesis: Is Life on Earth Ultimately Self-Destructive?

The Flooded Earth: Our Future In a World Without Ice Caps

The Consequential Frontier: Challenging the Privatization of Space

Rare Earth: Why Complex Life is Uncommon in the Universe

A New History of Life: The Radical New Discoveries about the Origins and Evolution of Life on Earth