Jacob Lake was being evacuated, and the North Rim of the Grand Canyon was closed to visitors because of the fast-moving White ...

It felt like paddling through soggy cereal. My wife and I were deep within Everglades National Park, struggling to kayak past dense mats of periphyton, a mass of algae, fungi and other organisms.

Canyonlands owes its existence to the mighty Colorado River, the same river responsible for the better-known Grand Canyon.