SWIMfriend Esteemed member Senior Member OG Pioneer Senior member Joined May 4, 2009 Messages 1,620 Merits 42 Jul 3, 2011 #1 ...including one as revelation of it's positive features written in 1969 by none other than Carl Sagan. They're listed, linked, and described here
...including one as revelation of it's positive features written in 1969 by none other than Carl Sagan. They're listed, linked, and described here
