• calcium, 1
• California Institute of Technology (Caltech), 1
• carbon, 1, 2, 3, 4
• Carroll, Lewis, 1
• Carter, Brandon, 1
• cellular automata, 1
• Cepheid variables, 1
• Chadwick, James, 1
• Chaitin, Gregory, 1
• chance, 1
• chemical fuels, 1, 2
• chlorine, 1, 2
• Clarke, Arthur C., 1, 2, 3, 4, 5
• CNO cycle, 1, 2
• cobalt, 1
• coin tossing: predicting out-come, 1
• combustion, 1
• Compton, Arthur, 1, 2
• Compton effect, 1, 2
• Comte, Auguste, 1
• conservation laws, 1
• contraction hypothesis, 1
• Copernicus, Nicolaus, 1, 2
• cosmic background radiation, 1, 2, 3
• cosmic light horizon, 1
• CP violation, 1
• Critchfield, Charles, 1
• Curie, Marie, 1, 2
• Curie, Pierre, 1