Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Doomsday scenarios

  1. Sep 20, 2007 #1
    Hi all,

    I'm new to the forum,so please excuse my ignorance:smile:

    I was reading through some of the threads in here and my mind is completely boggled!

    Just wondering,in all your opinions,what astronomical process do you reckon will pose the greatest threat to man-kind in relation to extinction??

    I know it's a very broad topic but would love to see your opinions!

    Last edited: Sep 20, 2007
  2. jcsd
  3. Sep 20, 2007 #2
    At this rate, we won't have to worry about natural processes, because we will have destroyed ourselves long before.
  4. Sep 20, 2007 #3


    User Avatar
    Science Advisor
    Homework Helper

    Most likely - large meteor/comet impact. Happens every few 100million years. Big blast, clouds of dust, long winter. Wipes out 50-90% of species. Not good.

    Less likely - nearby supernova. Radiation kills pretty much everything living on surface. Ok if you are a fish.

    Least likely - nearby gamma ray burst (supernova on steroids). Radiation shreds planet like a butterfly hit by a shotgun. Game over.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook