Out of all the world's biomes, deserts are some of the best archaeological locations. That's because of their arid nature.

The new year arrived not only with fireworks, but with displays of aurora across the world at much more southerly latitudes ...

"This discovery poses a challenge to the Lambda Cold Dark Matter model, which may struggle to account for the formation of such small, aligned groups of galaxies in isolated environments." ...

The Grand Canyon harbors a healthy population of bighorn sheep, but they are most likely seen while hiking deep into the ...

National parks have much to offer, from scenic hikes to impressive biodiversity. They can also be incredible places to enjoy ...

From dance parties to fancy dinners to balloon drops for kids, here's what's happening in Tucson on New Year's Eve.