Explores past mass extinctions, and examines the possible future causes of human extinction. Includes black-and-white illustrations, a glossary, and additional resources.

Earth : a very brief history -- Mass extinctions : the first four of five -- Mass extinctions, continued : the fifth one got the dinosaurs -- Homo sapiens : not the only humans -- DNA bottleneck : that time humans almost went extinct -- Asteroids : incominggggg! -- Supervolcanoes : the blast from below -- Disease : teeny tiny threats like bacteria and virus -- Over population : we live here, we eat here; until we don't -- War : the ultimate self-destruct button -- Sun : we're gonna need stronger SPF -- Outer space : aliens, supernovas, gamma-ray bursts -- Global warming : who turned up the heat? -- 5-2À celsius : just a wee bit warmer -- We're doomed (JK, how to save the planet people).