Our planet now faces a global extinction crisis never witnessed by humankind. Scientists predict that more than 1 million species are on track for extinction in the coming decades. But there’s still ...

DESCRIPTION: Savannah elephants are the larger of the two African elephant species. They also have thicker, more curved tusks, more triangulated ears, and differently shaped skulls. Both elephant ...

Wolverines, the largest land-dwelling species in the mustelid family, are famous for their daring and tenacity — they've been known to prey on animals as big as moose, and many stories tell of ...

Humans are the number-one cause of death for California mountain lions. Lack of connectivity due to decades of extending roads and development into mountain lion habitat, with little regard for the ...

The yellow-billed cuckoo is sometimes called the "rain crow" because its song is often heard just before thunderstorms or summer showers. But this rare bird raises its voice less and less often in ...

Atrazine is one of the most commonly used herbicides in the United States: Approximately 80 million pounds of it are used across the country each year. It's a common contaminant of ground, surface and ...

The scientific name Phocoena is from the Latin word “porpoise” or “pig fish.” Sinus means “cavity,” a reference to the Gulf of California. Put together, Phocoena sinus is the “porpoise of the Gulf of ...

Though it doesn't boast fancy plumage, the grayish-brown, sparrow-like Inyo California towhee is remarkable for its tenacity. Despite the population's limited range and complete isolation from other ...

Each colored area on this map represents a different country's mining claim in the Clario-Clipperton zone. Map courtesy International Seabed Authority.

An analysis of oil and gas pipeline safety in the United States reveals a troubling history of spills, contamination, injuries and deaths. This time-lapse video shows pipeline incidents from 1986 to ...

DESCRIPTION: Least Bell's vireos are small songbirds, generally no more than five inches in length, with a seven-inch wingspan. They have dull, ashy-grey heads; wings and tail are somewhat darker.

For generations, Nevada’s big-eyed, black-freckled Dixie Valley toad thrived in a small desert oasis, hidden from humans. But by the time scientists described it in 2017, the toad was already ...