Atlantis Online
March 28, 2024, 04:18:22 pm
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Has the Location of the Center City of Atlantis Been Identified?
http://www.mysterious-america.net/hasatlantisbeenf.html
 
  Home Help Arcade Gallery Links Staff List Calendar Login Register  

Catastrophes and Prehistory

Pages: 1 2 [3]   Go Down
  Print  
Author Topic: Catastrophes and Prehistory  (Read 7843 times)
0 Members and 102 Guests are viewing this topic.
Troy Exeter
Superhero Member
******
Posts: 2113



« Reply #30 on: March 18, 2007, 10:30:26 pm »

This hypothesis was mentioned by Carl Sagan in the 1985 book "Comet" and first raised by Rampino and Stothers in a 1984 issue of Nature. It is still very controversial, but so was the Dinosaur/Impact hypothesis until the early 1990s.

See also:

American Scientist article Perturbing the Oort Cloud (new URL) by Michael Szpir, Jan/Feb 1997 issue.
Astrophysical Journal letter Tidal Imprint on Oort Comet Cloud by Matese & Whitmire (subscribers only).
The recent announcement of a possible 10th planet amongst the Oort cloud raises another possible source of periodic impacts. However, if such a planet does exist its orbital period is likely to be less than 10 million years.
Nemesis: Origin of the theory by Richard Muller
CCNet: PERIODICITY IN THE TERRESTRIAL RECORD by Bill Napier
Royal Astronomical Society of Canada Dec 98: Impact cratering through geologic time by Gene Shoemaker (3Mb PDF). Gene argued that we are in a peak for comet impacts and the Australasian Tektite event is an example of this peak.
5 Jul 05 NewSci (subs): Mass extinction theory on the rocks
The Oort Comet Cloud and Its Interaction With Our Milky Way Galaxy - John Matese

--------------------------------------------------------------------------------

Send suggestions for this page to Michael Paine.

Last update 16 Feb 2001

Return to Australian Spaceguard Survey


http://users.tpg.com.au/users/tps-seti/crater.html

Report Spam   Logged
Pages: 1 2 [3]   Go Up
  Print  
 
Jump to:  

Powered by EzPortal
Bookmark this site! | Upgrade This Forum
SMF For Free - Create your own Forum
Powered by SMF | SMF © 2016, Simple Machines
Privacy Policy