New reports show ice in Antarctica continues melting at an advanced rate in summer months, and ice in the Arctic region is re-forming at a slower rate in winter months.

A major earthquake struck mountainous central Italy, killing more than 90 people and leaving tens of thousands homeless. Buildings more than 500 years old in the medieval town of L'Aquila were among those damaged. Video.

As tornado season touches down in the U.S., see a high-tech tornado chaser's stunning footage of twisters—and of lightning as you've never seen it, in superslow motion.

A medieval historian in Italy found what is believed to be a portrait, hidden beneath another painting, of Leonardo da Vinci. Video.

African penguins, or jackass penguins—the only penguins to breed on the African continent—are dwindling in number, mainly because of pollution and overfishing. Now conservationists hope a fiberglass box can help penguin chicks survive. Video.

A Kazakh woman claims to be 130 years old, making her the oldest living human in history. Her doctor believes she's 130, and her passport is offered as proof, but skeptics question the claim. Video.

New technology allows a person limited control of a humanoid robot, according to the Honda Research Institute. Based on the flow of electricity and blood in a person's brain, the robot reportedly can move its hand, run, and "eat." Video.

Hundreds of people captured tens of thousands of invasive, poisonous cane toads Sunday. After being "humanely" killed, many of the toads will be ground into fertilizer. Video.

Dogs are used to protect sheep and other livestock from the cheetahs in Africa, thereby saving the big cats from potential shootings by aggrieved farmers. Video.

Many of the whales rescued from a mass stranding in Australia this week have re-beached themselves and died. Video.

Mud and ash flows from Alaska's Redoubt Volcano are threatening a terminal storing millions of gallons of oil. Geologists expect the volcano to remain active for some time. Video.

After beaching themselves in Australia, a group of pilot whales were saved and trucked to deeper waters. Video.

An animal behaviorist regularly romps with lions on his private animal preserve in South Africa. "If they did kill me ... if I had the opportunity to come back after dying, I would do it all the same," he says. Video.

Veterinarians in Miami have successfully fitted a badly injured crocodile with metal plates and 41 Frankensteinian screws on its skull. The croc had been hit by a car in the Florida Keys. Video.

Pounding fortified beehives with big sticks and other tools, a chimpanzee group in Africa has been filmed using the most sophisticated honey-gathering methods yet seen among wild chimps. Video.