Being right- or left-handed is a familiar fact about yourself that you likely don't think about much on a day-to-day basis. However, your handedness affects how you interact with the world.

For the first time, researchers in France and Israel have observed how an emulsified liquid droplet can transform from a hexagon into a six-pointed star shape in response to rising temperature.

Being left- or right-handed – and the paw, eye, fin and wing equivalents – is a product of genes, development and the environment.