Niece, brother and GB (youngest son and most dyslexic of Ponder children) are left handed. All very creative, outside the box thinkers and interestingly unique in their pursuits. This article details recent studies about left handed-ism and the many routes it is acquired. I'm not buying all of it, or at least, I think it is a little alarmist. But has some interesting stuff for the lefties we love (or are).
(Loves this t-shirt - I'm Left Handed. What's Your Super Power?)