Nobel prize winners discuss their work
The winners of the 2014 Nobel prizes in chemistry and economic sciences discuss their work during a press conference in Sweden, ahead of the awards ceremony.
UC Santa Barbara scientist Shuji Nakamura points to a laser during a tour of the lab after winning the 2014 Nobel Prize for physics for invention of blue LED light October 07, 2014, in Santa Barbara, California. Nakamura and two Japanese scientists shared the prize for the invention of an efficient blue light-emitting diodes using semiconductors, which has enabled bright and energy-saving white light sources. (Getty Images)
(Reuters YouTube channel)