The winners of this year's Nobel Prizes are being awarded in Stockholm this week.
Oliver Smithies of the United States, left, Sir Martin Evans of Britain and Mario Capecchi of the United States.
Three share prize for their discoveries of "principles for introducing specific gene modifications in mice by the use of embryonic stem cells"
Al Gore of the United States with the United Nations' Intergovernmental Panel on Climate Control
Al Gore and the IPCC win Nobel for their efforts "to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change."
Leonid Hurwicz, left, Eric Maskin and Roger Myerson of the United States.
Leonid Hurwicz, Eric Maskin and Roger Myerson win Nobel for "having laid the foundations of mechanism design theory."