The links below are to PDF files with updated pages for Life through
Time. These changes will be incorporated in future print runs of
the book. In an effort to avoid fostering misconceptions we present
them here so that you can incorporate them into your use of the unit
Page 12: We wanted to be more accurate
with the Tree of Life illustration and clarify that sea stars, sea urchins,
and sand dollars branch off before sea squirtsand to show mammal
development more distinct from reptile.
Page 23: Sow bugs were moved to join
the crustaceans. Mollusks and annelids have been removed. The order
of branching of arthropod groups has shifted.
Page 32: The ichthyosaur and eurhinosaurus,
marine reptiles, have been moved here to the reptiles page. Previously
they were incorrectly on the fish page.
Page 33: Updated the fish page eliminating
the two reptiles, as mentioned above. Also deleted the scales from the
Page 34: The label on the coelondonta
has been changed to "wooly rhinoceros" to align with the text.
(Coelondonta is also correct, but we didn't want to confuse.)
Page 65: Changed "Early Fish"
to "Early Jawed Fish" and "Marine Snail" label to
Page 120: Cycads and gingkoes were
deleted and appear in a later time span.
Page 155: Teleost (bony) fish were
not in this time span; we substituted cartilaginous fish.
Page 161: The fossil gingko originally
shown here also moves.
Page 190: Flowering plants shown
in the text are from the next time span; we replaced them with Mesozoic
Page 194: Deleted the oak leaf fossil;
it appeared in the Cenozoic.