Have you hear the one about the scientist who set out to alleviate diseases associated with menopause and found a solution for world hunger? No, really.

Scientist Loretta Mayer, a researcher at Northern Arizona University, along with colleagues there and at the University of Arizona, discovered a a nontoxic chemical technology causes infertility in rats.

Leonardo DiCaprio is having singing lessons to sound like Frank Sinatra. The "Titanic" actor is keen to portray the legendary singer in a new biopic but needs to prove to director Martin Scorsese he has the vocal talent to carry it off.

A source told Britain's The Sun newspaper: "Leonardo has hired a top vocal coach to get him sounding like Sinatra. He is a massive fan of the singer and has always wanted to play him. He would be upset to miss out on the leading role because his singing wasn't up to scratch.

China's cyber espionage operation has been stealing sensitive information from government office computers in 103 countries, according to Canadian researchers.

A team of researchers at the University of Toronto has found that China's GhostNet system had sent e-mails containing malware to target computers. The malware prompts the infected computer to download a Trojan program called ghost RAT, which allow attackers to control the computers and bring its data to servers in mainland China.

An entire city's train traffic was brought to a stop Saturday by a rat that authorities discovered was stuck in a hotel signal box.

Stockholm residents suffered a three-hour traffic delay, with officials primarily failing to find the source of the problem. Questions about the transit problem were answered when the police finally found the large rat inside the signal box at the basement of a local Sheraton Hotel.

The Livingston County American Red Cross honored a 2-year old English Mastiff, who according to them had donated blood more than 20 times.

The donations of the dog, named Lurch, had reportedly been of great help to the organization, as it had even aided in the recovery of a dog that ingested rat poison.