Rising temperatures in coming decades would lead to less sea ice in the Southern Ocean surrounding Antarctica and fewer nesting sites and feeding grounds for penguins.
Skype, with its promises of total security and privacy, has long been popular with Chinese looking to keep their conversations away from the prying eyes of government censors.
In an article published in The Lancet, they predicted 65 million deaths from chronic obstructive pulmonary disease (COPD) and 18 million deaths from lung cancer between 2003 and 2033.
Spacewalker Zhai Zhigang and two other astronauts on board the Shenzhou VII landed around 5:40 p.m (0940 GMT) on the steppes of northern Inner Mongolia region.
"I'm feeling quite well. I greet the Chinese people and the people of the world", Zhai said as he climbed out of the craft, his historic achievement carried live on state television.
Dutch farmers say algae could be the answer to the world's energy crisis. It might take years, but then it could go a long way toward easing the world's energy needs and responding to global warming.
Numerous chemical compounds in water influence the growth, behaviour, reproduction and the immune function of organisms, due to interference with the endocrine system.
Two British archeologists said Stonehenge was a kind of primeval Lourdes. They also say they have dated the first stone monuments at the site to about 2,300 B.C.
