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 By two million years ago, Earth had entered an intense ice age that continues today. Bigger, better-insulated bodies do well in colder conditions, and many mammals had evolved to be massive.
These mammals spread across the globe as new land bridges connected continents. Our own species moved among them, affecting other species in ways that would soon change the planet forever.
Scientists learn about Quaternary mammals through a number of specimens and fossils.
Continue to Ice Age Mammals. >>
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