Are left-handed people in their right minds?

Most of the human race is right-handed, and its been that way for 500,000 years. Dr Naomi Lavelle finds out more about handedness.

Famous lefties: Bob Geldof

SCIENTISTS tell us that as far back as 500,000 years ago, our ancestors were predominantly right handed, just like today. Yet, the argument about what causes our handedness is still up for debate.

The most widely held theories are that handedness is a genetic trait and is determined by which hemisphere (side) of our brain is the most dominant. A staggering 85-90% of people are right handed.