His Holiness the Dalai Lama spoke at an inaugural event for a new institute in his name, the Dalai Lama Center for Ethics and Transformative Values. He tempered his provocative ideas about promoting ethics in a secular society with a stream of lively banter. He recalled that he had visited a homeless shelter in San Francisco the other day and told a man he met that he, too, had suffered the same fate after he went into exile in 1959. "I said, 'me too. Homeless'."

This illustration shows a lead sulfide quantum dot array. Each quantum dot (the colored clusters) is 'passivated' by molecules that bind to its surface. Dots that are made up of unequal amounts of lead and sulfur tend to cause electrons (shown in red) to become highly localized, which can substantially lower the electrical transport of the device.Image: Donghun Kim and Jeffrey C. Grossman
Balance is key to making quantum-dot solar cells work
MIT team finds that the ratio of component atoms is vital to performance.