Environmental groups argued against the project, warning that a spill would be difficult to plug and clean up in the remote and inhospitable Arctic.

CNN: Ice floe halts Shell's new Arctic well

"During the surgery, we go to the area that has been damaged, clean out scar tissue and plug in a new, engineered urethra, " said Atala.

CNN: Scientists 'seed' cells, make new organs

China, America, Europe and the rest of the world must rapidly accelerate the pace of improvement in a whole suite of clean energy technologies, from nuclear and solar alike to plug-in hybrid vehicles, energy storage, and advanced biofuels.

FORBES: Connect

Ever since, carmakers have been placing their low-emission bets more on plug-in hybrids, clean diesels or pure electric vehicles.

ECONOMIST: Tech.view