Plato was the first to suggest that the good is diffusive. It’s in the very nature of the good to expand, to pour itself out. Why? Of course the ancient Greeks could go no farther than to identify the ...

Double-diffusive convection arises in stratified fluids where two properties – typically heat and solute (for example, salt) – diffuse at different rates, leading to intricate and sometimes ...

Real invisibility cloaks are rather complex and work in certain situations only. The laws of physics prevent an optical invisibility cloak from making objects in air invisible for any directions, ...