Plant parts used to generate electricity
Researchers have built an energy conversion technology inspired by photosynthesis, the process plants use to convert sunlight into food. It may one day power remote sensors. Full story
Solar plane makes first stopover in US odyssey
A Swiss-made, solar-powered airplane called Solar Impulse has finished the first leg of its months-long, fuel-free aerial odyssey across America.
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Pope to tweet farewell as he leaves Vatican
Pope Benedict XVI, the first pope to join Twitter, will post his last tweet on the social network at 11 a.m. ET, Thursday, right when he's expected to leave the Vatican by helicopter on his last day as pontiff. The papal Twitter account, @Pontifex, will be then be suspended until his successor is elected.
