Think of dinosaurs, along with other
fossils,
as telling us something important about
history
and that history is in a sense the
history that came before us, but it's
our history to.
What happened,
what heaven on this earth?
What were those changes?
And what lessons can we learn from that?
Let's just take extinction, that massive
dinosaur extinction 
that wiped out seventy five percent of
all the species on the globe.
Currently because of environmental
destruction we're experiencing a mass
extinction event this century, in the
twenty first century.
So looking at those past events
especially
trying to investigate the question,
how did species and
ecologies or ecosystems recover after
that extinction event? how long did it
take them to bounce back? Only
paleontologists can answer those
questions.
