A new study suggests ancient wood floated into a cave far above the Colorado River when a meteorite-induced earthquake triggered a landslide, a dam, and an ancient lake.

She was written out of Grand Canyon history, but fires are putting her iconic buildings at risk. Meet Mary Colter, the architect you've never heard of.

In this secluded paradise, mail still arrives by mule, turquoise cascades tumble into travertine pools, and time flows at the pace of the river.

"Though it was definitely not your average vacation trip, everything worked out okay. We made the best of it," Russ Christian said.

The Dragon Bravo Fire started on July 4 and was managed at first as a controlled burn. Then the wind picked up, and it quickly became uncontrollable.

What fueled the explosive growth of the Dragon Bravo Fire was a mix of gusty winds, dry air and above-normal heat – weather conditions experts described as atypical for this time of year, when monsoonal moisture typically tamps down wildfire risk across Arizona.