Big Bear Mountain Resort surprised bike enthusiasts with an announcement to open its mountain bike park early as the ski ...

Big names from the newest tire category battle it out on dry, wet, and snow-covered surfaces to see which is the ultimate evolution in all-season rubber.

A new analysis by UC Boulder geologists suggests the ancient Mars landscape was formed by falling precipitation, including ...

Arborists are hoping to transform vacant land on Detroit’s eastside by planting giant sequoias, the world’s largest trees.

Artist's depiction of water rushing into Mars' Jezero Crater, which billions of years ago was the site of a delta. (Credit: ...

UC Davis professor Hugh Safford found the highest living tree in California on a recent hike through the High Sierra.

Though once thought to be siphonophores — colonies of specialized zooids — the velella velella is now classified as a single ...

A spring snowstorm that moved into Colorado on Friday dropped more than a foot of snow in parts of the state's high country, ...

A professor's casual hike in the High Sierra turned into a new elevation record for California's highest tree, the Jeffrey pine, which wasn't formerly known to grow at extreme elevations.

The alert level remains high for the storm affecting the north and central parts of Italy: Lombardy and Emilia-Romagna are at ...

It's not just Niagara Falls. Many states in the US have impressive waterfalls. Some require a hike, but others are easy to ...

Several Tahoe ski resorts will close after this weekend. Here's what kind of weather skiers and snowboarders can expect on the slopes.