Fighting off, and feeding on, rodents that would gnaw away at masterpieces, dozens of "working" cats patrol the labyrinthine storerooms of Russia's Hermitage museum. Video.

Hoisted—upside down—onto flatbeds, tranquilized Malawian elephants were being trucked away after deadly encounters with local people. Now the community, fearing loss of tourism revenue, says the animals should stay. Video.

Methane-rich pig excrement on a large Netherlands farm is being turned into electricity and partially fed into the national power grid. Video.

In Lithuania, eating crow isn't an exercise in public humiliation, as the English idiom suggests. Here, crow is literally eaten, and says one connoisseur, "it increases sexual potency." Video.

Thailand's capital city of Bangkok is struggling to cope with a growing population of stray dogs. It's estimated as many as 300,000 strays wander the streets. Video.

Manatees can't hear the low sounds of boat engines, which is why the animals are frequently injured, a researcher says. A high-pitched alarm could solve the problem. Video.

Apes laugh too, say researchers who tickled gorillas, chimps, orangutans, bonobos, and human babies—suggesting laughter began in a prehistoric ape-human ancestor. Video.

Researchers have discovered ten new emperor penguin colonies by spotting penguin excrement stains on Antarctic ice from satellite images. Video.

The rescue of an orangutan in Indonesia underscores threats posed by the expansion of palm oil plantations. Orangutans could be extinct in parts of Borneo within two years, experts say. Video.

After 400 years beavers are once again gnawing at British branches. But because hunting made native beavers regionally extinct, the new generation had to be shipped in from Norway. Video.

In New York City, where beekeeping is illegal due to health concerns, bee lovers often put hives on rooftops to avoid detection. Video.

When panda pornography didn't entice a male panda to mate with his female partner at a Thai zoo, staff next tried artificial insemination, which resulted in a surprise birth this week. Video.

A white tiger mauled and killed one of its keepers at a wildlife park in New Zealand on Wednesday in front of visitors. Video.

Recent Komodo dragon attacks on Indonesians—including a park ranger who shows his Komodo scars—have convinced some villagers that the man-size lizards are becoming more aggressive.Video.

In and around Australia's Great Barrier Reef, researchers with the Census of Marine Life have discovered hundreds of new species. Video.