Today's air, water and land contest is a three-part competition, pitting teams from each time period against one another. / While playing "cold and hot," a game they made up, the Pteranodon kids learn ...

'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine' Mark Warner says shutdown could end ‘this week’ with Trump back in ...

Millions of years ago, Earth looked very different. All the continents were fused into one, teeming with life that was both beautiful and terrifying. Secret Service finds 17 'skimming' devices in tour ...

Just months after the federal government closed on a land exchange with a billionaire, a proposal to institute a permit system on the Blue River has ignited a conversation about river access and ...