Cambridge, Massachusetts - Carbon sequestration promises to address greenhouse-gas emissions by capturing carbon dioxide from the atmosphere and injecting it deep below the Earth’s surface, where it would permanently solidify into rock. The U.S. Environmental Protection Agency estimates that current carbon-sequestration technologies may eliminate up to 90 percent of carbon dioxide emissions from coal-fired power plants.

Cambridge, Massachusetts - Some physical principles have been considered immutable since the time of Isaac Newton: Light always travels in straight lines. No physical object can change its speed unless some outside force acts on it.

Cambridge, Massachusetts - When a person lives on less than $2 a day - as some 2.7 billion people around the world do - there isn’t room for a product like a solar lantern or a water filter to fail.

New York, New York - The former information technology manager for Liberty Reserve, a company that operated one of the world’s most widely used digital currency services, was sentenced Friday to 36 months in prison for conspiring to operate an unlicensed money transmitting business.

Austin, Texas - Scientists using ice-penetrating radar data collected by NASA’s Operation IceBridge and earlier airborne campaigns have built the first comprehensive map of layers deep inside the Greenland Ice Sheet, opening a window on past climate conditions and the ice sheet’s potentially perilous future.

Davis, California - Mechanical and Aerospace Engineering students at the University of California, Davis will have a rare opportunity to speak with Expedition 42 crew members currently aboard the International Space Station (ISS) at 12:45 p.m. EST (9:45 a.m. PST) Thursday, February 5. The 20-minute Earth-to-space call will air live on NASA Television and the agency’s website.