Geographic features responsible for biodiversity also shape human languages.
The effects of mining activity contribute to concerns about a number of prominent waterways.
A circle of ice on North Dakota's Sheyenne River is a rare winter spectacle. Continue reading →
Even though the California Gold Rush took place more than a century ago, it left a toxic legacy of mercury pollution.
The force of hurricane Isaac drove the Mississippi backwards for nearly 24 hours.
A simple, new hydropower dam offers energy without destructive side effects.