Flagstaff is an excellent base for travelers to Northern Arizona, located east of Grand Canyon National Park. National park ...

The Perseverance rover has found some intriguing samples on the red planet. Here's what they might reveal about the origins ...

This image, taken by Curiosity, shows a selfie in front of Mont Mercou, a 20-foot-tall rock formation on Mars. This image, captured by the HiRISE camera, shows a bear-like face on Mars, formed by ...