The pygmy hippopotamus, now 6 months old, is Thailand’s biggest celebrity, and the crowds keep flocking. What explains her charm?

The reptiles, an endangered species, were incapacitated when the water temperature plummeted after a rare winter storm hit the Panhandle last week.

The president, who has assailed California’s leaders over wildfires, issued the directive in an executive order that was dated Friday but released on Sunday.

The president, who has assailed California’s leaders over wildfires, issued the directive in an executive order that was dated Friday but released on Sunday.

At the Brooklyn Botanic Garden, a so-called corpse flower bloomed for the first time on Friday. The smell was not unlike rotting flesh.

Many climate experts see its deserts as a place to build the green-energy future. For two local activists, the price is too great.

The proposed rules would have slowed more ships to prevent collisions with endangered North Atlantic right whales.

A million years ago, a species known as Homo erectus most likely survived in an arid desert with no trees.

Scientists say the snail darter, whose endangered species status delayed the building of a dam in Tennessee in the 1970s, is a genetic match of a different fish.

Researchers say that the killer whale’s newborn calf in Puget Sound has also died and she’s unable to let go.

Researchers are trying a new strategy to reintroduce Hawaiian crows, which have been extinct in the wild for two decades.

© Jack Jeffrey, via Photo Resource Hawaii/Alamy

Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.

This Southeast Asian island, home to some of the world’s strangest and most iconic creatures, is a dream destination for a growing number of “mammal watchers.”

© Mihir Zaveri

A study of a 12,800-year-old skull of a toddler offers a glimpse at how early Americans found food, and how their hunts may have led to a mass extinction.

Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.

Researchers are trying a new strategy to reintroduce Hawaiian crows, which have been extinct in the wild for two decades.

© Jack Jeffrey, via Photo Resource Hawaii/Alamy