Food and beverages Food and beverages    FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Agriculture on a galactic timescale          Food and beverages Forum Index -> Food and beverages View previous topic :: View next topic   Author Message Oh No Guest Posted: Mon Apr 23, 2007 8:26 pm    Post subject: Agriculture on a galactic timescale Another indication of the effect of cosmic rays on living conditions on Earth. The Solar system does not just go around with the galactic disc, but also (like other stars) oscillates up and down through it. Mass extinctions have apparently coincided with periods when it was at the edge of the disc. http://news.nationalgeographic.com/news/2007/04/070420-extinctions.html Regards -- Charles Francis moderator sci.physics.foundations. substitute charles for NotI to email -- Posted via a free Usenet account from http://www.teranews.com Back to top   Ads Advertising Sponsor Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         Food and beverages Forum Index -> Food and beverages All times are GMT Page 1 of 1   Jump to: Select a forum Food and beverages----------------Food and beverages  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum 142 Attacks blocked Powered by phpBB © 2001, 2005 phpBB Group