1. Comets and the origins and evolution of life

   • Paul J. Thomas

   Commentary Pages: 265 - 266

2. Comets and the formation of biochemical compounds on the primitive Earth – A review

   • J. Oró
   • T. Mills
   • A. Lazcano

   ReviewPaper Pages: 267 - 277

3. Cometary origin of carbon, nitrogen and water on the Earth

   • A. H. Delsemme

   OriginalPaper Pages: 279 - 298

4. Comets as a possible source of prebiotic molecules

   • W. F. Huebner
   • D. C. Boice

   OriginalPaper Pages: 299 - 315

5. Comet impacts and chemical evolution on the bombarded Earth

   • Verne R. Oberbeck
   • Hans Aggarwal

   OriginalPaper Pages: 317 - 338

6. Cometary supply of terrestrial organics: Lessons from the K/T and the present epoch

   • Duncan Steel

   OriginalPaper Pages: 339 - 357

7. Computational study of radiation chemical processing in comet nuclei

   • Rafael Navarro-González
   • Cyril Ponnamperuma
   • Raj K. Khanna

   OriginalPaper Pages: 359 - 374

8. The origin of the polycyclic aromatic hydrocarbons in meteorites

   • Michael R. Wing
   • Jeffrey L. Bada

   OriginalPaper Pages: 375 - 383

9. The fate of organic matter during planetary accretion: Preliminary studies of the organic chemistry of experimentally shocked murchison meteorite

   • Tracy N. Tingle
   • James A. Tyburczy
   • Christopher H. Becker

   OriginalPaper Pages: 385 - 397

10. Recent observations of interstellar molecules: Detection of CCO and a limit on H₂C₃O

    • R. D. Brown
    • D. M. Cragg
    • M. Ohishi

    OriginalPaper Pages: 399 - 405

11. Terrestrial and extraterrestrial sources of molecular homochirality

    • William A. Bonner

    OriginalPaper Pages: 407 - 420

12. Dark matter in the solar system: Hydrogen cyanide polymers

    • Clifford N. Matthews

    OriginalPaper Pages: 421 - 434