Even Ancient Trilobites Were Social Live Science - September 21, 2009
Biggest Trilobite Sea Beasts Found ... in Swarms National Geographic - May 12, 2009
Petrified Animals Trilobites Died Quickly Live Science - February 26, 2008
Trilobite was ancient snack food BBC - April 14, 2004
Giant trilobite discovered BBC - October 9, 2000
ANCIENT AND LOST CIVILIZATIONS
ALPHABETICAL INDEX OF ALL FILES
