The terms theory and model are defined, and students learn how a theory remains valid.

By reimagining the kinks and folds of origami as atoms in a lattice, researchers are uncovering strange behavior hiding in simple structures.

Some atomic nuclei are not shaped like rugby balls, as a longstanding theory suggests, but are instead somewhat flattened, like almonds, according to a new study by Japanese scientists.

WE publish this week, as a special supplement, the substance of an address by Prof. N. Bohr on the development of the theory of atomic structure, and in particular of the latest form and ...

Philosophy of Science, Vol. 26, No. 4 (Oct., 1959), pp. 295-309 (15 pages) A theory, analogous with the kinetic theory of heat, is described, in which the role of heat is shared by all the phenomena ...