Sharon Levy is a contributing editor at OnEarth Magazine, and she writes regularly for National Wildlife, BioScience, Audubon and New Scientist. Her work has also appeared in many other top science magazines, such as Natural History, Nature, Wildlife Conservation, High Country News and Discovery Channel Online. View Sharon Levy's April, 2011 SftPublic lecture based on her new book, Once and Future Giants.

Once and Future Giants: What Ice-Age Extinctions Tell Us about the Fate of Earth's Largest Animals. Sharon Levy. Oxford University Press, 2011