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The ancient skulls came to light again in October when flood waters receded. (Submitted Photo)

Ancient bison skulls unearthed by flood show evolution story

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PIERRE (AP) -- More than 100 bison skulls unearthed by the 2011 Missouri River flood are giving scientists more information about how the modern bison evolved.


The 101 skulls found in October by the U.S. Army Corps of Engineers date from 10,000-5,000 years ago and reveal the changing face -- and horns -- of the bison.

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