Which of these famous left-handers was a scientist?

About what percentage of the world’s population is thought to be left-handed?

Which blood-pumping organ lies 2/3 the left side on the body and only 1/3 on the right?

Fleming’s Left Hand Rule can be found in which science subject?

So why are some people left-handed…?

One theory of left-handedness suggests that it runs in families.  Scientifically this would mean being left-handed is…

Another theory suggests that changes can occur to one certain human organ during birth and this can make someone left-handed.  Which movement-controlling organ is this?

Medieval architects designed spiral stairs which turned clockwise when viewed from the bottom.  Why was this?

It is a myth that all polar bears are left-handed, but you would still never see one attack a penguin with its right paw.  Why?

Most species of snails’ shells coil in a right-handed way, but very occasionally an error occurs in an embryo snail and its shell comes out left-handed.  These lefty snails are highly valued.  What class of animals are snails in?

Molecules can be left-handed or right-handed: mirror images of each other. The molecule that gives caraway its aroma is the mirror image of what other smelly molecule?