'This formation in the Rockies' Burgess Pass yielded weird  500 million-year-old fossils like <a href="http://www.j-archive.com/media/2006-05-17_DJ_25.jpg" target="_blank">Hallucigenia</a>'
the Burgess Shale
THE EARLY EARTH: This formation in the Rockies' Burgess Pass yielded weird  500 million-year-old fossils like Hallucigenia
This formation in the Rockies' Burgess Pass yielded weird  500 million-year-old fossils like Hallucigenia
This formation in the Rockies' Burgess Pass yielded weird  500 million-year-old fossils like Hallucigenia
THE EARLY EARTH
the Burgess Shale
THE EARLY EARTH