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.

Scientists said microbes that exist on so little energy - 50 quintillion times less than humans - can expand our notions of what being alive looks like.

Emperor penguins are the only penguin species that breed on sea ice, which has made them vulnerable to the climate crisis.

The belief that some animals can be ethically consumed, while others can't, is an irrational, arbitrary feeling that is completely subject to a person's culture, upbringing and personal tastes.

When Diego, 100, first started his work, the giant Española tortoises were nearing extinction.