Historic otter tooth present in Mexico suggests mammals migrated throughout America

An historic otter tooth lately found in Mexico suggests sure mammals migrated throughout America in the course of the Miocene geologic epoch, roughly 23 million to five.three million years in the past. The brand new hypothesized route questions different theories reminiscent of migrations above Canada and thru Panama, and has implications for a a lot bigger biologic occasion — the Nice American Biotic Interchange, when land bridges have been shaped and animals dispersed to and from North America and South America.
Paleontology News — ScienceDaily

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