A big drawback of solar power is that it doesn't work at night or on cloudy days. But researchers at MIT say they now have an inexpensive way to store solar energy when the sun isn't out.
Declining the revolutionary model that Egypt established in overthrowing Mubarak, Saudi reformers are working for a shift in mind-sets as well as policies – and making headway.
What happens when ordinary people decide to pay it forward? Extraordinary change. See how individuals are making a difference...
Bill Morse stands outside the Landmine Museum in Siem Reap, Cambodia, wearing the Army uniform of the pro-Western Lon Nol government (1970-75).
From the good life to digging up land mines in Cambodia
While living in Palm Springs, Calif., with retirement looming, Bill Morse chose to move to Cambodia to help activist Aki Ra rid the country of land mines that kill and maim.
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