Ambidextrous tendencies may mean better memory: “Having a close left-handed relative makes right-handers better at

remembering events than those from exclusively right-handed

families, new research suggests. There is a downside, however, as

members of these ambidextrous families may be relatively

impaired in their ability to recall facts.

According to the study, having a left-handed sibling or parent means

the organisation of your brain is intermediate between a pure ‘lefty’

and a pure ‘righty’.

Specifically, Stephen Christman and Ruth Propper at the University

of Toledo, Ohio claim that people with ‘lefties’ in the family have a

larger corpus callosum – the connection between the brain

hemispheres. This makes you better at certain memory tasks, but

worse at others, they believe.” New Scientist