The animal kingdom is full of lefties and righties, although rarely is the ratio skewed as much as it is in humans. If you're wondering about your own pet, you can find out with a simple experiment.
People who have an extreme preference for using their right hand may be worse at maths, according to new research.
The way early humans learned to handle food could explain why the majority of people today are right handed.
The development of 'handedness' and language are closely linked.