China said Friday it had hooked its first so-called "fourth generation" nuclear reactor to the grid, a breakthrough that could eventually reduce its reliance on uranium imports

The experimental fast-neutron reactor is the result of more than 20 years of research and could also help minimize radioactive waste from nuclear energy, the state-run China Institute of Atomic Energy (CIAE) said.

The space shuttle passed into history Thursday, the words "wheels stop" crackling over the cockpit radio for the very last time.

In an almost anticlimactic end to the 30-year-old program, Atlantis and its four astronauts glided to a ghostly landing in near-darkness after one last visit to the International Space Station, completing the 135th and final shuttle flight.

Japanese bio engineers have succeeded in growing a tooth from cells implanted into a mouse kidney, using a technique that could create replacement organs faster than previously tested methods.

Biologists have previously cultivated teeth in a laboratory and successfully transplanted them into the jaws of mice, but Japanese researchers have hailed the latest development as offering much faster growth rates.

Nepal's government has ordered a new measurement of Mount Everest to determine exactly how high the world's highest mountain is, an official said Wednesday.

Nepal has continued to recognize the decades-old measurement of 29,028 feet (8,448 meters). However, there have been other claims recently by China and western climbers.

An expectant silence hangs over the Pukaha bird sanctuary as hundreds of spectators await a glimpse of a rare white kiwi, a bird held sacred by New Zealand's indigenous Maori people.

A collective sigh follows his unveiling to the crowd, although this appears to be prompted more by the chick's cute appearance than any mystical qualities.

Scientists scouring the mountains of Borneo spotted a toad species last seen in 1924 by European explorers and provided the world with the first photographs of the colorful, spindly legged creature, a researcher said Thursday.

In recent years, the Washington-based Conservation International placed the Sambas stream toad, also known as the Bornean rainbow toad, on a world "Top 10 Most Wanted Lost Frogs" and voiced fears it might be extinct.

Life is tough for the top baboon.

Oh sure, you're No. 1 so you get the best food and girl baboons. But there's also all that pressure to defend your status.

Large predators like sharks, lions and wolves are on the decline worldwide, a trend that is disrupting the Earth's ecosystem in all kinds of unusual ways, researchers said Thursday.

If you have been to the the beach, chances are you have experienced an unfortunate rite of summer: The sunburn. Skin so swollen it hurts to bend. The heat that rises from reddened shoulders. The "ow, ow, ow" from the shower after you thought the pain had faded.

For all the creams that promise to soothe, there aren't super treatments for a sunburn. Dermatologists say the best bet: Some of the same pills you pop for a headache — like the ibuprofen found in Motrin and Advil, or naproxen brands such as Aleve.

Environmental campaigners Wednesday accused suppliers to major clothing brands including Adidas and Nike of poisoning China's major rivers with hazardous chemicals linked to hormonal problems.

Greenpeace said eight samples of wastewater discharge from two factories in the Yangtze and Pearl River deltas, identified as suppliers for the brands, contained "a cocktail of hazardous chemicals".