Way up north in Alaska, Katmai National Park protects a vast landscape (over 4 million acres!) of volcanoes, tundra, lakes ...

Enormous herds of animals roamed the Arctic tundra thousands of years ago. Just a fraction remain today, but some scientists say they should be brought back to help fight climate change. Wild horses, ...

For nearly two decades, scientists have noted dramatic changes in arctic tundra habitat. Researchers set out to discover what could be behind the changes. For nearly two decades, scientists have noted ...

For nearly two decades, scientists have noted dramatic changes in arctic tundra habitat. Ankle-high grasses and sedges have given way to a sea of woody shrubs growing to waist- or neck-deep heights.