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...sperm are not ready for transplantation into human patients - in any case, British law prohibits their transplantation into people - but they may provide valuable clues to the causes of male infertility. Nayernia's group is now working on creating sperm from the skin cells of infertile men (the sperm cells in the current study were generated from embryos discarded by fertility clinics), and by studying the way those sperm develop, researchers may gain insight into the origins of infertility and potential new treatments. Theoretically, for example, if sperm could be created from the cells of a cancer patient...

Author: /time Magazine | Title: Scientists Create Human Sperm from Stem Cells | 7/8/2009 | See Source »

...exactly be able to retire on the payoff. Plus, the website is still evolving, and the company still needs to find corporate buyers who will take on the credits - which right now would be useful only on a voluntary level, not to meet any corporate carbon reductions required by law...

Author: /time Magazine | Title: Getting Your Slice of the Cap-and-Trade Pie | 7/7/2009 | See Source »

When the House of Representatives passed the American Clean Energy and Security Act on June 26, it was a landmark moment for environmental politics. If the bill passes the Senate to become law - no sure thing, given the 60 votes needed in the upper chamber - it would establish the first national caps on carbon emissions. It would also create what would almost certainly be the world's biggest greenhouse-gas market, since companies would have the option to buy and sell carbon credits and offsets. Every smart, efficient enterprise that can rapidly bring down its emissions will be able...

Author: /time Magazine | Title: Getting Your Slice of the Cap-and-Trade Pie | 7/7/2009 | See Source »

...China on a national security-related conviction, a charge she says was politically motivated. The WUC denied this week that it had any role in the violence and said security forces used heavy-handed methods to confront demonstrators who were attempting to protest peacefully for equal rights under the law...

Author: /time Magazine | Title: After Deadly Riots, Ethnic Tensions Heat Up in Urumqi | 7/7/2009 | See Source »

...When I was born, segregation was still the law of the land in parts of America, and my father's Kenya was still a colony," he told the graduating students. "When you were born, a school like this would have been impossible, and the Internet was only known to a privileged few. You get to decide what comes next...

Author: /time Magazine | Title: Obama Treads Lightly on Democracy in Russia | 7/7/2009 | See Source »

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