Aaron Lewis travels to Geneva where scientists are attempting to answer one of life's big questions: where does everything in the universe get its mass?

As Aaron reports, one of the most complicated machines ever built, known as the Large Hadron Collider, may hold the answers. When it's turned on in 2008, scientists hope it will reveal the ellusive subatomic particle called the Higgs Boson, also known as the God particle. Scientists believe the God particle is what gives everything in the universe its mass - but even they admit that finding it will be like searching for one tiny needle in 100,000 haystacks.

Also in this episode – an interview with former cricket superstar Imran Kahn.

About International Dateline 

SBS Dateline, which began in 1984, is Australia's longest-running international current affairs program. It has a well-earned reputation for authoritative and incisive reporting. Dateline has taken the traditional way of producing TV current affairs and turned it on its head. Reporters who used to travel with a cameraperson and sound recordist now travel alone and have the responsibility of both filming and reporting their stories. The reporters became video-journalists, gaining access to people and places that the conventional camera crews cannot.