Fall is an excellent time to enjoy the U.S. National Parks. As early as Labor Day weekend, the leaves start to change ...

Giant dams built to conserve the Colorado River have nearly wiped out nearby native cottonwood trees, causing big ecosystem disruption. Tiny dams built to mimic those built by beavers could bring ...

The Waterloo Volunteer Fire Department confirmed that one person, a woman, was killed after a Cottonwood tree fell on a truck at Two Rivers State Park. The woman was declared dead at the scene.

The Waterloo Fire Department responded to the scene at approximately 6:53 a.m. after a large cottonwood tree fell on a vehicle at the park.

As the amount of daylight gets shorter in the fall, chlorophyll production in leaves slows down and eventually stops.

A woman was killed and a man was seriously injured after a large tree fell on their truck in Nebraska during severe weather.

A large cottonwood tree fell onto a truck, killing one person and trapping the other, Nebraska officials say. Getty Images/iStockphoto A tree fell on top of a pickup truck at a Nebraska state park ...