Hundreds of animals, from tiny ants to mighty hippos, are shaping the Earth's surface as powerfully as floods and storms.

The playful North American river otter is equally at home in the water and on land. It makes its home in a burrow near the water's edge, and can thrive in river, lake, swamp, or estuary ecosystems.

More than a quarter of our planet's natural "geomorphs"—animals such as beavers and hippos that, collectively, can reshape ...

North American river otters are extremely active and playful animals that can be found in ... they can run up to 15 mph on land. Though their populations were threatened decades ago, mainly ...

After weeks of waiting and acclimating to their new habitats and enclosures, the animals at the Amazon River’s Edge at the Caldwell Zoo are out and about for visitors to see.