Watch: Penguins released back into Argentinian ocean after being nursed back to health
The animals had showed signs of malnutrition and hypothermia. One of them had been oiled, and another one had ingested plastics.
Watch: Mama bear, cubs enjoy back scratches in Maine woods
A mother bear and her three cubs were caught on camera being cute.
Hissing snake pulled from Arizona toilet in 'once-in-a-million' flush
A snake expert from Arizona successfully captured a black-and-pink Coachwhip discovered in a residential toilet near Tucson.
'Got all that?': Grandmother horse gives birth, paternity mystery baffles park rangers
Park rangers said the herd's family tree just got complicated.
Watch: Terrified raccoon wreaks havoc in Utah soccer stadium during rain delay
Video shows captivated fans scream as the raccoon falls from an overhang onto the main concourse. Chaos ensues.
Otter attacks women tubing on Montana river; one airlifted to hospital
One woman's wounds were so severe that she had to be airlifted to a hospital, authorities said.
Watch: Eagle swoops down and catches fish midair, wowing onlookers
A bald eagle put on an impressive show for a man and his friends when it swooped down and caught a fish high in the air.
'King Otis' fans rejoice: Famed brown bear returns to Alaska live cam
"King Otis" is a live cam star and four-time Fat Bear Week champion.
Video: Florida scuba diver frees trapped nurse shark from fishing line caught in artificial reef
A Florida diver came face-to-face with an entangled nurse shark as he worked to free the animal from the coral blue waters of Destin.
Beached whales euthanized in Australia after frantic rescue efforts fail
Officials said the whales were euthanized "to avoid prolonging their suffering."
Watch: Volunteers try desperately to save nearly 100 beached whales in Australia
Drone footage showed the whales clustering and forming into a heart shape before stranding themselves on the beach.
Woman dies after grizzly bear encounter near Yellowstone National Park
A woman was found dead in Montana on Saturday after coming into contact with a grizzly bear on a trail west of Yellowstone National Park.
See the rare blue frog spotted in Rhode Island
Some of Rhode Island's frog species can occasionally exhibit rare blue coloration.
Drug-addicted 'cocaine sharks' may be devouring dumped drugs off Florida coast
Thousands of sharks off Florida's coast may have ingested bales of cocaine left in the water by drug smugglers attempting to get their product into the United States.
Fierce black bear 'UFC match' caught on camera in Florida homeowner's yard: 'Never seen that before'
Two black bears had an intense clash in a Florida homeowner's yard – and it was all caught on his home surveillance camera.
Suspected lioness on the loose near Berlin: police
Nearby residents were advised to stay indoors if possible, to refrain from walks and jogs in the woods, and to take dogs at most for short walks on a leash.
Dolphin and her baby rescued after being trapped in pond for 2 years
Video shows a group of rescuers gently capture the dolphins and bring them safely back to the open waters where they belong.
Maine woman, 64, punches bear in nose after it chased her dog
The woman was bitten when she stepped in between her dog and the black bear, which had been chasing her pet – and punched the bear in the nose.
Rare lizard found only in major US oil patch proposed as endangered species
The dunes sagebrush lizard has quite the natural habitat. It's found only in parts of one of the world's most lucrative oil and natural gas basins.
Ticks use static electricity to latch on to you from afar, researchers find
Ticks can't jump or fly onto their hosts, but static electricity gives them a boost, researchers have found.