In the fall cleaning campaign, Yellowstone's geology team discovered a trove of unusual items tossed by visitors.

At this time of year, bears are more likely to become aggressive due to the urgency of fattening up for winter.

The overall wildebeest population has seen a sharp decline in recent years, falling below 600,000 animals.

The team investigated not only the stomach of the ancient wolf, but also cut open its tissues and organs for a detailed analysis.

The researchers selected human words not already familiar to the whale to see if it could mimic new sounds.

One Water's proprietary interlocking bottle design reduces the carbon footprint by an unprecedented up to 35%.

The guinea pigs were split into two groups; one listened to compressed music, and the other to uncompressed music.

Although Madison appeared quite happy while extracting this icy water from the cave, viewers and even experts warn against ...

The octopus latched onto the diver's hand and tried to snatch his camera. The diver then wagged his finger, telling no.

The tourists aboard the boat took the penguin to the safety of an iceberg, where its fellow flock members awaited.

The ever-accelerating global warming threatens to steal away the greenery and the fresh produce of this thriving park.

Bullfrogs were introduced into the western habitats a few years ago, where they quickly became a threat to other animals.