>>Mark Norell: A new dinosaur is coming to
the halls of the American Museum of Natural History.
This Titanosaur is a really huge
animal. It's over 120 feet long.
It lived in what's now present-day Argentina about
100 million years ago.
The last 20 years have really been the new Golden Age of dinosaur discovery.
New kinds of animals have been found all over the world -
in Africa, in Asia, in Patagonia - 
and this is just one of the latest ones
A couple years ago, one of my
ex-graduate students Diego Pol sent me an email
saying that a farmer near Trelew in
Patagonia had found an amazing dinosaur, one
of the largest land animals ever to live.
Over the next couple of years, they extracted
this specimen from the rocks at the ranch.
>> Peter May: We went down to Argentina and
we 3D-scanned all the bones in the field and
in the lab. We had the whole skeleton completely
digitized in 4 weeks. We took the data and
then we carved the bones out of slabs of foam
with our 5-axis milling machine. We molded
all the elements once they're carved up, and
then we have a complete copy of the skeleton
and from there we can cast all the elements
out of fiberglass. Then the cast gets mounted.
>>Mark Norell: When you're trying to determine
the mass or the weight of an animal this big,
it's pretty tough. A good example of that
is if you pick up a puppy, it's pretty heavy
compared to picking up a bird - a chicken
- that's about the same size. That's because
their bones are constructed very differently.
The bones of this Titanosaur, were not hollow
- they were what we call cancellous, so they
have lots of little tiny air pockets all through
them like a piece of styrofoam. So the bones
themselves would be very, very, very light.
That's the only way an animal like this could
get so big. We chose to display this animal
now because it represents one of the newest
big dinosaurs thats been found anywhere in
the world. We have some tremendous things
here. We have the blue whale, we have the
Tyrannosaurus rex, we have the Barosaurus,
and now we're going to have the Titanosaur.
