Physicists develop new strategy to separate molecules In our daily lives, the purpose and function of an item is defined by either its material, e.g. a rain jacket is fabricated of water-proof material, or its shape, e.g. a wheel is round to enable a rolling motion.

Raven observers show emotional contagion with raven demonstrators experiencing an unpleasant affect To effectively navigate the social world, we need information about each other's emotions.