How light waves demonstrate their wave nature by reflection, refraction, and diffraction.

Robert T. Bakker is a paleontologist from Wyoming, known for his enthusiastic approach to understanding the behavior and lives of dinosaurs. He has propounded many controversial ideas about dinosaurs, some of which are described here.

A classroom wiki where students present profiles of scientists who developed models of the atom or who contributed to the understanding of atomic theory. Covers Democritus, Aristotle, John Dalton, J.J. Thomson, Ernest Rutherford, Marie...