Europe has many sizeable countries with expansive topographical features to match. Here are the biggest organized from least ...

For a long time, Neanderthal routes for their second wave of migration had been a huge mystery for experts. Recently, a team of researchers has used supercomputers to understand this elusive path ...

Explore the Missouri River: its map, amazing history, why it's called 'Big Muddy,' and key facts about North America's longest river.

The remains of landscapes thought to have formed when ancient rivers flowed across East Antarctica have been discovered—and ...

After a day of catastrophic floods along the Guadalupe River, Texas officials issued alerts for regions around the San Gabriel River on Saturday ...

The Texas Hill Country has been notorious for flash floods caused by the Guadalupe River. Here's why the area is called "Flash Flood Alley." ...

Flooding caused by the overflowing Guadalupe River has prompted widespread evacuations in Kerrville and surrounding areas of Kerr County, Texas.

Multiple parts of Central Texas, including Kerr County, were shocked by flash floods Friday when the Guadalupe River and others rose rapidly.

The Russian Far East, which stretches from the Ural Mountains to the Pacific, is vast and contains most of what China ...

Many of the publicly-owned properties along the San Joaquin River are closed, but there are a number of places where you can legally enjoy the water.

Traffic on the Don River in the Kalachevsky district of Russia's Volgograd region was temporarily restricted to eliminate wreckage from a "massive" Ukrainian drone attack, the regional governor's ...