In his new book, Terra, fossil hunter Michael Novacek writes that Earth is overburdened and that the planet faces a mass extinction. Novacek, a paleontologist and curator at the American Museum of Natural History, combines evolutionary biology, paleontology, and modern environmental science to look at how the natural world as we know it came to be, and the human factors that could put it at risk.
Novacek discusses the history of ecosystems on Earth, and current risks to the environment.
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