http://joshuacolwell.com/blog/index.php/2007/science-and-hot-tempers/ Science, astronomy, politics, movies, and various minutiae. Tue, 13 Mar 2012 23:50:00 +0000 hourly 1 http://wordpress.org/?v=3.3.2 http://joshuacolwell.com/blog/index.php/2007/science-and-hot-tempers/comment-page-1/#comment-42904 Bruce Moomaw Mon, 03 Dec 2007 08:58:32 +0000 http://joshuacolwell.com/blog/?p=249#comment-42904 My own feeling re UFOs is to consider that this planet has been around for 4.5 billion years, and that many of its largest fossil beds are 600 million years old -- and that, during that 600 million years, even if you assume that alien expeditions visit here only once every 200,000 years, that would still make for 3000 landings. And yet we have yet to discover one fossilized alien radio, screw, or Kleenex. One is forced to conclude either that star-travelling aliens are extremely rare, or that they're awful tidy. My own feeling re UFOs is to consider that this planet has been around for 4.5 billion years, and that many of its largest fossil beds are 600 million years old — and that, during that 600 million years, even if you assume that alien expeditions visit here only once every 200,000 years, that would still make for 3000 landings. And yet we have yet to discover one fossilized alien radio, screw, or Kleenex. One is forced to conclude either that star-travelling aliens are extremely rare, or that they’re awful tidy.

]]>