Surgeons in Sweden replaced an American patient's cancerous windpipe with a scaffold built from nanofibers and seeded with the patient's stem cells. Lead surgeon Dr. Paolo Macchiarini discusses the procedure and the benefits of tissue-engineered synthetic organs.
Scientists have confirmed that rocks collected recently in the Moroccan desert came from the Red Planet. University of Alberta meteorite expert Chris Herd, who has acquired one of the chunks, talks about how scientists analyze space rocks, and whether organic compounds might be found inside.
Search and rescue operations at the wreck of the Costa Concordia have resumed, after being halted for a third time, due to choppy waters and the partially submerged vessel's tendency to shift on the rocks near Italy's coast.
The websites of Israel's El Al airline and the Tel Aviv Stock Exchange were knocked offline Monday, just hours after a Saudi Arabian hacker threatened to act against them. Israeli hackers responded by crashing the Saudi stock exchange. Here, a man walks past an El Al office in Tel Aviv on Monday.
An online battle is raging between Israelis and Arabs, with each side unveiling credit card and other personal information of thousands of private citizens, as well as temporarily disabling high-profile websites, like the Tel Aviv and Saudi Arabian stock exchanges.
So far, the recent Web assaults seem to be the work of bored young people venting frustration. But others worry that these actions could easily escalate into a much larger online fight.
In 1978, the farmers in a small Chinese village called Xiaogang gathered in a mud hut to sign a secret contract. They thought it might get them executed. Instead, it wound up transforming China's economy in ways that are still reverberating today.
The contract was so risky — and such a big deal — because it was created at the height of communism in China. Everyone worked on the village's collective farm; there was no personal property.
"Back then, even one straw belonged to the group," says Yen Jingchang, who was a farmer in Xiaogang in 1978. "No one owned anything."