When Director Bryon Schroeder and Archaeologist Erika Blecha arrived at the ranch with other experts, they confirmed that what had been found was not just a fossil, but a mammoth tusk.

The ivory from the tusks likely would have been turned into spearheads, researchers said. The find leads to a greater understanding of how humans and mammoths lived in the valley before the peak ...

And here are favorite wildflower hikes and scenic drives in Arizona. Most years, Picacho Peak State Park can be counted on for a profusion of wildflowers. This year, the park's website advises people ...

And here are favorite wildflower hikes and scenic drives in Arizona. Most years, Picacho Peak State Park can be counted on for a profusion of wildflowers. This year, the park's website advises ...

Scientists say they have the first recorded video evidence of narwhals using tusks not only to strike and manipulate fish during feeding but also engage in what appears to be playful behavior ...