Testing (1) Density (1) Price-earnings ratio (1) Mark, German (1) Socialites (1) Elliptical galaxies (1) Wings (Anatomy) (1) Time (1) Technical literature (1) State, The (1) Stars (1) Sphere (1) Relaxation (1) Reality (1) Radius (Anatomy) (1) Radiation (1) Quasars (1) Pension trusts (1) Motion picture actors and actresses (1) Life (1) Intertropical convergence zone (1) Hypothesis (1) Galaxies (1) Force and energy (1) Exchange (1) Example (1) Equilibrium (1) Crowds (1) Communication of technical information (1) Communication in science (1)