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The producers used CGI to create the
. CGI designers recreated the
supercontinent of Pangea. This was a
land mass that slowly broke up to form the
of today. The designers also made volcanoes, sand
, floods, old forests, and the dinosaurs. The series starts with the
of tiny dinosaurs. It ends with the
T. rex. Freeman says these are "the most iconic dinosaurs of all
". It also shows us the asteroid impact that killed off the dinosaurs. A
said, "the geology and
are powerfully made".