Tokyo police are investigating whether a man who cooked his own severed genitals and served them to five paying diners committed a crime, the force said Tuesday.

Mao Sugiyama had his penis and testicles surgically removed in March and kept them frozen for two months before cooking them at a public event in May.

Russian investigators were on Monday questioning a mother on suspicion of murdering her two young children by throwing them to their deaths from the 15th floor of their apartment block.

Galina Ryabkova took her boys, aged four and seven, from their apartment on the eight floor of the housing block in the Moscow region town of Dolgoprudny to a balcony of the 15th floor of the building, investigators said.

For all the time they spend online, and it's a lot, nearly half of U.S. teenagers say they'd much rather spend time with friends in the real world, a major survey published Tuesday indicated.

Nine out of 10 young Americans aged 13 to 17 who took part in the national survey for Common Sense Media, a San Francisco think tank, acknowledged using some form of social networking.

Uggie, the canine star of the Oscar-winning film "The Artist," Monday added his paw print alongside other Hollywood greats in a ceremony marking his official retirement.

The Jack Russell Terrier added his mark to the famous forecourt at Grauman's Chinese Theater, where other stars of the silver screen such as Marilyn Monroe and Clark Gable have been immortalized.

An Austrian firm has come up what it hopes is the next big thing for the mega-rich: a man-made, floating "island" with a list price of 5.2 million euros ($6.5 million), the company's founder told AFP Monday.

Measuring 20 by 37 meters (66 by 121 feet), the "Orsos Island" has no engine but can be anchored anywhere its owners choose and then towed to another location the other side of the world if they so wish, Hungarian-born Gabor Orsos said.

A British man has committed suicide by climbing up the Eiffel Tower in Paris and jumping to his death, officials said on Monday.

Police spotted the man climbing the structure of the tower around 11:30 pm (2130 GMT) on Sunday. They evacuated the tower, sealed off the area and tried to negotiate with the man.

A Croatian couple arrived home from vacation to find their private library of several thousand books had disappeared from their house in downtown Zagreb, police said Sunday.

The 74-year-old man and his wife, 64, said the collection was worth "several dozen thousands of kunas" (several thousand euros, dollars), including some antique books, and had been collected over the course of years, police said in a statement.

A penguin whose break-out from an aquarium in Japan gave him a following around the world is to be formally named after months of being known just by his number, an official said Monday.

Humboldt penguin No. 337 spent 82 days at large in and around Tokyo Bay after bolting his enclosure, evading aquarium staff, an army of public onlookers and even Japan's well-equipped coastguard.

A critically endangered Sumatran rhinoceros was born Saturday at an Indonesian sanctuary, only the fourth birth in captivity in more than a century, boosting survival hopes for the species, say conservationists.

"Ratu gave birth to a male baby at 00:45 (1745 GMT Friday) on Saturday. Both the mother and the baby are all very well," conservationist Widodo Ramono, who works at a sanctuary on the southern tip of Sumatra island, told Agence France Presse.

Electric car maker Tesla's first mass-market sedans took to the road Friday, but it's not certain whether their debut will make or break the fledgling company.

Ten of the sedans, called the Model S, rolled out the door at the company's Fremont factory during a ceremony that had the feel of a pep rally.