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Rare frog fossil sheds light on a gap in Arizona's geological record

A tiny fossil find in northern Arizona fills shows frogs hopped (or not hopped) straight through a mass extinction.... Read more»

Paleontology

'Citizen scientist' discovers huge bed of dinosaur remains in Az

One chilly morning in the wilds of eastern Arizona a Tucson dinosaur hunter followed a twinkling trail and found a fountainhead of fossils. Stan Krzyzanowski even has a dinosaur named after him.... Read more»1