Canadian, Japanese scientists win Nobel Prize for neutrino research

This year's Nobel Prize in Physics has been awarded to a Japanese and a Canadian scientist for their work on tiny puzzling subatomic particles known as neutrinos.

Neutrinos are the second most bountiful particles after photons, the particles of light, with trillions of them streaming through our bodies every second, but their true nature has been poorly understood.

Takaaki Kajita did early work on the tiny particles at a purpose-built underground laboratory a kilometer beneath a mountain in central Japan.

Canadian Arthur McDonald was also awarded the prize. His work at the Sudbury Neutrino Observatory demonstrated that neutrinos from the Sun don't disappear on their way to Earth, but change form instead.

Together their work overturned the prevailing theory that neutrinos have no mass, and has forced physicists to reconsider the fundamental make-up of the universe.

Speaking by telephone to a news conference in Stockholm, McDonald said his discoveries not only gave scientists a more complete understanding of the world at a fundamental level, but could also shed light on the science behind fusion power, which drives the Sun and could one day be tapped as a source of electricity on Earth.

The scientists will share the $960,000 prize.