Researchers analyzed radioisotopes in layers of fossilized volcanic ash. Decay of uranium to lead within tiny crystals enabled scientists to precisely pinpoint dates for certain events. They ...

It was an ordinary day at his Los Angeles law office when John Nadolenco opened a letter from Brazil enlisting his help in a ...

Neil Armstrong never had it so good. From petrified forests to painted deserts, Arizona’s rock formations are a geological ...

Arizona’s got some seriously out-of-this-world scenery that’ll have you checking your GPS to make sure you’re still on terra ...