Chapter,  Paragraph

 1 15,3|     scientists call the “Cambrian explosion.” Creatures with hard-shelled
 2 15,3|        and insects. Another great explosion of life begins 225 million
 3 15,2|         much later than the great explosion of marine life. It has been
 4 15,2|          life during the Cambrian explosion. Land plants occur much
 5 15,2| evolutionary standards; it was an explosion with no real advance warning.
 6 15,2|           of evolution about this explosion. In fact, they often don'
 7 15,2|           don't even see it as an explosion, or perhaps they can't.
 8 15,2|           refer to the population explosion of mammals occurring after
 9 15,2|           not the only to have an explosion of new species. As the dinosaurs
10 15,2|        the earth saw the greatest explosion of flora in its history.~ “