When it comes to the fall of the Roman Empire, this climate shift may have been the straw that broke the camel’s back.” ...

Scientists have found previously undocumented ash deposits buried beneath the Lava Creek Tuff in Wyoming — and at least one ...

Crater Lake, Oregon’s sapphire gem, stuns with its depth, clarity and volcanic origins — an unforgettable natural wonder.

Open since 1909, this Portland gem is also known as America's First Urban Quiet Park. Explore its many trails, reservoirs, ...