39- Spedicato, Atlantis, 10.
40. Ibid.
41. Alvarez, Catastrophes and Evolution, 11.
42. Hoyle, Origin of Universe, 37; Hoyle and Wickramasinghe, Life onMars, 180.
43. Verschuur, Impact, 133; Steel, Rogue Asteroids, 133–135, Steel, Rogue Asteroids, 134–135.
45. Verschuur, Impact, 134; Steel, Rogue Asteroids, 182; Dauber and Muller, Three Big Bangs, 49–50. Hoyle and Wickramasinghe, Life onMars, 178–179; Palmer, Catastropbism, 6; Levy, Quest for Comets, 130–132.
46. Clube and Napier, Cosmic Winter, 275-
47. Cited inHermetica, 111.
