An orphaned South African rhinoceros blinded by poachers who hit it on the head in the same attack that killed its mother has regained its vision after cataract surgery, its owners said Monday.

Roccy the rhino underwent the surgery on January 3 in the University of Pretoria's veterinary hospital and has now returned to his native Elandela game reserve in the country's northeast.

The world's first "test-tube" meat, a hamburger made from a cow's stem cells, will be produced this fall, Dutch scientist Mark Post told a major science conference on Sunday.

Post's aim is to invent an efficient way to produce skeletal muscle tissue in a laboratory that exactly mimics meat, and eventually replace the entire meat-animal industry.

Babies who are raised in homes where two or more languages are spoken may appear to talk later than those learning just one language, leaving parents puzzled and concerned as to the reasons why.

Conventional wisdom often suggests that such children are confused and so they take longer to talk. Or, parents may hear that any apparent delay is just an illusion because kids are little geniuses who can learn many languages quickly and easily.

Babies still too small to speak know how to make jokes and form friendships, say researchers at an Australian university who have spent two years filming the behavior of young children.

Academics at Charles Sturt University are studying how children interact with other infants while in childcare using footage obtained from tiny cameras strapped to their heads.

Bird flu experts meeting in Geneva on Friday ruled that controversial research on a mutant form of the virus potentially capable of being spread among humans should be made public.

Security assessments must however be carried out first before the two studies can be published and the research can continue, scientists agreed at a two-day meeting at the World Health Organization.

China will launch a manned spacecraft between June and August on a mission to take three astronauts to the Tiangong-1 module currently orbiting the Earth, state media reported Friday.

The trio will blast off on board the Shenzhou ("Divine Vessel") IX which will manually dock with the module, Xinhua news agency said, quoting a spokesman for China's manned space program.

Measured by environmental impact, a humble shrimp cocktail could be the most costly part of a typical restaurant meal, scientists said Friday.

If the seafood is produced on a typical Asian fish farm, a 100-gram (3.5 ounce) serving "has an ecosystem carbon footprint of an astounding 198 kilograms (436 pounds) of CO2," biologist J. Boone Kauffman said.

Playing a videogame that involves shooting enemies on a battlefield has helped some adults who were born with a rare eye disorder improve their vision later in life, scientists said Friday.

The research shows that some sensory abilities that may seem permanently impaired can be improved in adulthood, according to lead investigator Daphne Maurer of McMaster University in Canada.

Ancient legends of thunder gods can be explained today with the modern science of sound waves, said a U.S. scientist on Thursday who believes an auditory illusion inspired the creation of Stonehenge.

The famous, 5,000 year-old stone circle in Britain is one of the best-known world heritage sites and many have guessed at the reasons for its existence, from a prehistoric observatory to sun temple to sacred healing ground.

Astronauts and robots have united in space with a healthy handshake.

The commander of the International Space Station, Daniel Burbank, shook hands Wednesday with Robonaut. It's the first handshake ever between a human and a humanoid in space.