• Palmerston, Lord 1
• pampano 1
• Panama Canal 1
• pandas 1
• Panmure, Lord 1
• ‘Parallax’ (pseudonym) 1
• Paramount, Mt. 1
• parrotfish 1, 2
• passenger pigeon 1
• Pasteur, Louis 1
• Payne, E. J. 1 n
• Pearl Harbor 1
• Penguin, HMS 1, 2, 3
• penguins, as fuel 1, 2
• Perec, Georges 1
• perfect pitch 1
• Permian extinctions 1
• Pet Travel Scheme (PETS) 1 n
• Peyssonnel, J-A. 1
• pheromones 1, 2 n, 3
• Phipps, William 1
• phosphorescence:
  • see bioluminescence
• photosynthesis 1, 2, 3
• phytoplankton 1, 2, 3, 4, 5
• Piccard, Auguste 1, 2
• pilgrimage 1, 2
• pistol shrimp 1
• pit viper 1
• plate tectonics 1, 2, 3
• Plato 1
• Plutarch 1, 2
• Podestà Is. 1
• pollution, of N. Sea 1
  • of Pacific 1
  • of research bases in Antarctica 1
  • of space 1
• Porcupine, HMS 1
• Poseidon 1
• Power, Adm. Sir A. J. 1
• pressure, effects of 1, 2, 3, 4, 5, 6
• pressure stocks 1
• prison islands 1, 2
• ‘prochronic’ theory 1
• Ptolemy 1, 2
• Puerto Galera 1
• Pyrrho 1