India's Polar Satellite Launch Vehicle (PSLV) C-20 blasts off, carrying Indo-French satellite SARAL from the Satish Dhawan space centre at Sriharikota, north of the Indian city of Chennai, February 25, 2013. The Indian rocket carried seven satellites, the world's first smart phone-operated nano satellite, a space telescope satellite and four other foreign satellites, local media reported. Babu/Reuters
The solar-powered aircraft ‘Solar Impulse’ flew for 26 hours over Switzerland in April 2010. The unprecedented achievement of the privately financed Swiss plane highlights a serious gap in renewable energy. Despite a wingspan almost as wide as that of a Boeing 747, it carried just two passengers and puttered along at just 45 miles per hour. Laurent Gillieron/AP
John Maltabes, a Hewlett-Packard research engineer, is reflected in a sample sheet of thin, flexible electronic displays. Mr. Maltabes imagines a different future, one in which electronics are mass-produced like fabrics or newspapers. Tony Avelar/The Christian Science Monitor
John Maltabes, a research engineer at Hewlett-Packard, inspects a sample of a thin web for flaws in etched resistors. Mr. Maltabes is working on these so-called “roll-to-roll” methods for making flexible, paper-thin computer displays. Tony Avelar/The Christian Science Monitor
A digitally enhanced satellite image highlights oil and dispersants in the clean-up effort of the BP oil spill in the Gulf of Mexico last year. DigitalGlobe/Reuters
Nathan Lewis, professor of chemistry at the California Institute of Technology, has built photovoltaic cells that convert sunlight into chemical energy up to 40 times more efficiently than crops. Tony Avelar/The Christian Science Monitor
Postdoctoral scholar Shane Ardo uses light to produce hydrogen gas (the bubbles) in water at the California Institute of Technology.
There, at the Joint Center for Artificial Photosynthesis, scientists are trying to harness sunlight to generate chemical fuel, specifically by splitting water to generate hydrogen. Tony Avelar/The Christian Science Monitor
A Massachusetts Institute of Technology student tweezes a silicon wafer that, under high heat, will grow carbon nanotubes, some of the smallest conductors yet invented. Ann Hermes/Staff
Doctoral students at the Massachusetts Institute of Technology pour liquid nitrogen to cool down a near-infrared detector that will be used to image carbon nanotubes. Ann Hermes/Staff
"Jeopardy!" contestant Ken Jennings, who won a record 74 consecutive games, gestures to his opponent, "Watson," an IBM computer. On a nationally televised game of the quiz show in February, Watson beat both Mr. Jennings and Brad Rutter – two of the game’s all-time human champions. Seth Wenig/AP
Chilean authorities had issued an orange alert on Monday because of increased activity at the volcano.
ByEva Vergara and Gabriela Ulloa, Associated Press
One of South America's most active volcanoes erupted early Tuesday in southern Chile, spewing heavy smoke into the air as lava surged down its slopes, prompting authorities to evacuate thousands of people.