2. The Cronus Hypothesis - Extinction as a Necessary and Dynamic Balance to Evolutionary Diversification Corey J. A. Bradshaw, Ph.D. and Barry W. Brook, Ph.D. Journal of Cosmology, 2009, 2, 221-229.

3. Mass Extinction of Species: The Role of External Forcing. Andrew Glikson, Ph.D., Research School of Earth Science and School of Archaeology and Anthropology, Australian National University. Journal of Cosmology, 2009, 2, 230-234

4. The Case for the Younger Dryas Extraterrestrial Impact Event: Mammoth, Megafauna and Clovis Extinction Richard Firestone, Ph.D., Group leader of the Isotopes Project, Nuclear Science Division, Lawrence Berkeley National Laboratory. Journal of Cosmology, 2009, 2, 256-285.

5. What Caused the Megafaunal Extinctions? The Case Against Bolide Impact. Stuart J. Fiedel, Ph.D., Senior Archaeologist, The Louis Berger Group, Inc., Richmond, VA Journal of Cosmology, 2009, 2, 286-288.

6. Archaeological and Paleobiological Problems with the Case for the Extraterrestrial Younger Dryas Impact Event Marcus J. Hamilton, Ph.D., and Briggs Buchanan, Ph.D., Journal of Cosmology, 2009, Vol 2, pages 289-292.

7. Desperately Seeking a Cosmic Catastrophe 12,900 B.P. Richard Gillespie Ph.D., School of Earth and Environmental Sciences, University of Wollongong, NSW 2522, Australia; and Department of Archaeology and Natural History, Australian National University, Canberra ACT 0200, Australia. Journal of Cosmology, 2009, 2, 293-295.

8. Large-Body Impacts and Global Mass Extinctions: How Compelling is the Causal Relationship? Jonathan T. Hagstrum, Ph.D., U.S. Geological Survey, Menlo Park, CA. Journal of Cosmology, 2009, 2, 296-298.

9. Archaeological Perspectives on the ExtraTerrestrial Impact Hypothesis, 12,900 B.P. Terry L. Jones, Ph.D., California Polytechnic State University, San Luis Obispo, CA. Journal of Cosmology, 2009, 2, 299-300.

10. Contemporary Mass Extinction and the Human Population Imperative Jeffrey K McKee, Ph.D., Department of Anthropology, The Ohio State University. Journal of Cosmology, 2009, 2, 301-308

11. The Threat of Nuclear War Barry Levy, M.D. and Victor Sidel, M.D., Montefiore Medical Center, Albert Einstein College of Medicine, Tufts Medical Center. Journal of Cosmology, 2009, 2, 309-315.

12. The Next Mass Extinction: Human Evolution or Human Eradication Andrew R. Jones, Ph.D., California State University. Journal of Cosmology, 2009, 2, 316-333

13. Preventing the Next Mass Extinction Bruce Tonn, Ph.D. Department of Political Science, University of Tennessee, Knoxville, Tennessee, Journal of Cosmology, 2009, 2, 334-343

14. Comets, Catastrophes, and Earth's History William Napier, Ph.D., Astrobiology Center, Cardiff University, UK. Journal of Cosmology, 2009, 2, 344-355

15. Asteroids: Pebbles From Heaven A. Cellino, Ph.D., A. Dell'Oro, Ph.D. INAF - Osservatorio Astronomico di Torino, 10025 Pino Torinese, Italy, Journal of Cosmology, 2009, 2, 356-370

16. Asteroid Impacts the Earth: The Tsunami Hazard. Dragos Isvoranu, Ph.D., Viorel Badescu, Ph.D., Journal of Cosmology, 2009, 2, 419-439

17. Planetary Threats and Defense Jean-Luc Cambier, Ph.D., Lt. Col. P. Garretson, Maj. D., F. Kaupa, USAF AFMC AFRL/RZSA, Edwards Air Force Base. Journal of Cosmology, 2009, 2, 371-385

18. Asteroid Impact Threats: Advancements in Asteroid Science to Enable Rapid and Effective Deflection Missions Brent William Barbee, M.S.E., and Joseph A. Nuth III, Ph.D, Emergent Space Technologies, Inc., Greenbelt, MD., and NASA's Goddard Space Flight Center. Journal of Cosmology, 2009, 2, 386-410

19. Near Earth Object (NEO) Impact Threat: An International Policy Response Richard Crowther, Ph.D., Science and Technology Facilities Council, Harwell Science and Innovation Campus, Chilton, Oxfordshire OX, UK, Chair United Nations Working Group on NEOs. Journal of Cosmology, 2009, 2, 411-418

20. Avoiding Another Mass Extinction Due to N.E.O. Impact. Gianmarco Radice, Ph.D., Space Advanced Research Team, University of Glasgow, UK. Journal of Cosmology, 2009, 2, 440-451.

21. Extinction, Metamorphosis, Evolutionary Apoptosis,
and Genetically Programmed Species Mass Death R. Joseph, Ph.D., Journal of Cosmology, 2009, 2. 235-255.