Once & future giants : what Ice Age extinctions tell us about the fate of Earth's largest animals / Sharon Levy.
"Until about 13,000 years ago, North America was home to a menagerie of massive mammals. Mammoths, camels, and lions walked the ground that has become Wilshire Boulevard in Los Angeles and foraged on the marsh land now buried beneath Chicago's streets. Then, just as the first humans reache...
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