At least one book contains the "singularity at the center of the Earth' concept as well. (Well, he didn't call it that....)
Greg Bear's Forge of God. (1987) Jon "I am not Kirk, Spock, Luke, Buck, Flash or Arthur frelling Dent. I'm Dorothy Gale from Kansas." ~John Crichton / Farscape _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
