Sotheby's is putting some rare items up for auction, including what it calls the largest piece of Mars ever found on Earth.

By trapping trillions of gallons of water behind nearly 7,000 dams since 1835, enough to fill the Grand Canyon twice, humans have redistributed the planet’s mass enough to cause a phenomenon known as ...

A dinosaur fossil has been found in an unlikely way in an unlikely place, a hole drilled under the parking lot of a Colorado ...

A hiker has died on the South Kaibab Trail in the Grand Canyon National Park while attempting to reach the Colorado River.

From unexplained phenomena to baffling disappearances, follow the clues while discovering our country’s treasured protected ...

A 67-year-old Texas man died Tuesday at the Grand Canyon after abandoning an attempt to hike down to the Colorado River. He turned around and began ascending toward the rim before he was found, ...

A 67-year-old Texas man died Tuesday at the Grand Canyon after abandoning an attempt to hike down to the Colorado River. He ...

The NPS recommends avoiding hiking the Grand Canyon's inner trails between 10 a.m. and 4 p.m., when temperatures are at their ...

Utah offers incredible nearby road trips to diverse destinations like Crater Lake and Seattle. Travelers can explore ...

A massive meteor crater in northern Arizona continues to attract visitors and spark curiosity about space and science, ...

While this Route 66 attraction in Arizona flies under most passersby's radar, it offers an amazing chance to see an impact site caused by a meteor.

A fireball flashed across the sky on Thursday afternoon, which was visible to residents in several states.