The war against invasive vegetation is long and uncertain, but Everglades National Park is winning one important battle.

A Tennessee woman who had hiked down to Phantom Ranch on the floor of Grand Canyon National Park to join a river trip died when she was pulled into the Colorado River.

Yellowstone National Park closed all entrances Monday as flooding and rock and mud slides chewed away at park roads, forcing the evacuation of visitors in northern areas of the park due to "extremely hazardous conditions." With the potential for severe flooding in the southern half of the park, officials made the decision to shutter the entire park. Dramatic aerial footage captured by the park's helicopter manager demonstrated the damage being inflicted on the park.

Chicken eggs are pretty good chum, but alligator and crocodile eggs, sea turtle eggs, and even bird eggs are also high on the menu for black-and-white Argentine tegus, a lizard that arrived in Florida through the pet store trade and is threatening to upend Everglades National Park's ecosystems.