A figure is chiral when it is not superimposable on its mirror image.
Among the Archimedean solids we find two chiral forms, one turning to the right and the other to the left, respectively - the so-called "snub" polyhedron. The double helix is also chiral.
Many biological molecules are chiral, such as e.g. amino acids, carbohydrates, nucleic acids, sugar and proteins.
Louis Pasteur discovered the chirality of tartaric acid in 1860.
Chirality = "-handedness"
CHIRALITY IN METAEDER
MODEL OF CHIRAL CRYSTALLINE STRUCTURE
STRUKTURFORSCHUNG TH DARMSTADT