Researchers have for the first time demonstrated that gravity plays a role in the formation of molecular aggregates, and that it can even be used to make them right-handed or left-handed. Non-chiral porphyrins, shown with green blocks, can form screw-shaped chiral structures. The rotation (red arrows) and gravity (green arrows) determine whether left- or right-handed screw structures are formed (N. Micali et al) Many chemical and biochemical substances...
