The research paves way to understanding more about "the impact individual differences and animal environments have on animals’ experiences with visitors."

"Scientists have long hypothesized that animal vision has evolved to match the colors of light present in their environments,"

Chimpanzee communication is much more sophisticated than previously thought, providing new clues to origins of language in humans too.

The ruling came after a monkey named Estrellita was moved from its home to a zoo and died a week later.

Animals are evolving to survive — but researchers are not sure "all species are capable of changing and surviving.”

The fly behavior mimics how humans behaved during social isolation in pandemic conditions.

While climate change is causing some animals to shrink, city-based mammals are becoming heftier due to human food waste.

This is the first animal that doesn't show signs of deterioration in memory function over time, researchers said.

The bat fossil record is notoriously poor and patchy, and the current finding could help explain why bats die out eventually.

The research team is studying how spaceflight affects the squids -- to understand ways of preserving human health during long space missions.

Violence results in habitat degradation, over-exploitation of natural resources, and more frequent hunting -- putting these species at risk.

No factual evidence suggests that animals can transmit the disease to humans.

Toxins accumulate in the body the farther up the food chain you go, as animals eat more plants and prey with traces of chemicals.

This DNA could help evolutionary researchers convey statements about "how mammoths came to be mammoths, why they look the way they do and how diverse they were."

The very idea of cheetah reintroduction belies a heroic, political symbolism aimed at boosting a sense of national pride and identity.

Popular efforts to ban trophy hunting ignore the activity's positive ripple effects for endangered animals, experts say.

“I will pick up every single piece of your trash, pack them well in a box and mail it to your home as a souvenir,” the minister said.

An increase in the sea otter population within a region created a food chain shift that allowed crucial sea grass to thrive, say researchers.