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Old site in Tucson Mountains was active for a century

Old site in Tucson Mountains was active for a century

The Old Yuma Mine, part of the Amole Mining District in the Tucson Mountains, as it looked around 1920.

May 06, 2013 12:00 amLoading…
Old site in Tucson Mountains was active for a century

Old site in Tucson Mountains was active for a century

The Old Yuma Mine produced some of the world's premier mineral specimens, including vanadinite.

May 06, 2013 12:00 amLoading…

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The hearing of a dog is more sensitive than humans.

Dogs can hear much higher frequencies, which is why they respo…