Here are 10 animals that have some of the highest levels of testosterone and the impact it has on their behavior and characteristics.

Some animals are born with horns while others shed their antlers each year. But what's the evolutionary purpose?

Scientists suggest female frogs listen for changes in the male calls as a signal for when it's warm enough to mate.

Tadoba: Tigers and other animal stories ...

The most common and widespread species of deer in North America may rely on “photoluminescence” in some surprising ways.

The spread of an invasive pest called spongy moth is becoming a big threat to Olmsted County’s economy, environment, and ...

A study analyzed 503 documented cases of serpent cannibalism and found that the behavior can be seen in different snakes ...

Some of these animals are fantastic hunters that only rely on scavenging in extreme food shortages. Others are just too lazy to hunt down their own meals. Nevertheless, all of them have rightfully ...

In the video captured on Feb. 26, the great ape runs towards the glass and bangs its hand on it, causing it to crack.

Even at levels safe for humans, air pollution can disrupt the way some insects communicate with plants, and with each other.

Whether people follow a general trend when choosing a partner or consciously decide against it has a noticeable impact on the ...

Invasive species are a threat to biodiversity, causing damage to local ecosystems and, potentially, economic loss. Once a non ...