Known for its sparkling turquoise waters and white sand, Spain's Mediterranean beaches are developing a new reputation — for a growing number of jellyfish. Scientists blame overfishing and, possibly, climate change for the spike in stinging invertebrates.
At the Hagerman National Wildlife Refuge in Texas is where 97-year-old Karl Haller has been counting birds for decades. Haller says he plans to keep going for as long as he can. He already has been counting birds for more than 50 yers.
A nine-year study tracked more than 800 of the massive and largely mysterious whale sharks. For the first time, researchers have tracked the sharks' far-flung migration and where they may go to give birth.
The windswept island about 6 miles off the coast was a haven for a hugely diverse bird population until fishermen decimated the birds' ranks. Puffins have been successfully reintroduced to Eastern Egg Rock, but warming ocean waters may be threatening their ability to survive.
In New Zealand last week, Rory the cat was brought to the vet after eating rat poison. He needed a blood transfusion fast. There was no time to get a donor match, so the vet took a risk and used blood from a dog donor instead. The inter-species gamble paid off.
This cousin of the raccoon is the first new carnivore discovered in the Western Hemisphere in 35 years. Native to the Andes Mountains of Colombia and Ecuador where it's still living, the olinguito was actually first identified in a Field Museum specimen storage room in Chicago.
Across the West, the Bureau of Land Management grapples with dwindling holding space for wild horses it has rounded up. But advocates say the bureau's housing of mustangs is not only ineffective but unsustainable. The cost of keeping the horses has tripled since 2000.
A mother taking her son around a zoo in China thought her boy was mistaken when he pointed out the barking lion. But he was right. The zoo had taken their African lion away for breeding, and moved in an employee's large and hairy mastiff dog.
A wild herd of bison has been roaming the rugged Santa Catalina Island since the 1920s, when the animals were brought there by a film crew shooting a movie that was never made. With no natural predators, the bison population quickly exploded.