Utah tracks are the oldest evidence of birds from the Cretaceous of the USA http://t.co/yymaRbLBB3 New science via @Paleojim @ShamanSciences
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Utah tracks are the oldest evidence of birds from the Cretaceous of the USA http://t.co/yymaRbLBB3 New science via @Paleojim @ShamanSciences
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Oldest evidence of birds from the Cretaceous of the USA, fossil tracks are the best! http://t.co/RHSOHvcFun from @Paleojim @ShamanSciences
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Utah tracks are the oldest evidence of birds from the Cretaceous of the USA http://t.co/yymaRbLBB3 New science via @Paleojim @ShamanSciences