DAVID CHILDRESS:
These are the mysterious ruins
of Puma Punku,
high in the Altaplano
of Bolivia.
It's made out of gigantic blocks
of sandstone and granite.
Some of them are weighing
over a hundred tons.
Many of the granite blocks
are finely articulated,
as if they were made
by precision power tools.
Archaeologists are baffled
by this structure.
They don't know what was here,
or what the purpose
of Puma Punku originally was.
BRIEN FOERSTER:
Puma Punku is unique
in terms of its construction.
Nowhere on Earth do we see
the same style
of cutting into the stone
and the same obvious use
of highly precision tools
in the distant past.
That's what makes it
so mysterious.
Not only do these granite blocks
have precision corners,
but they also have
these difficult drill holes
that are going
right through the rock.
Whatever kind of drilling
mechanism they're using here
has to penetrate
this very hard granite.
FOERSTER:
It's an astonishing piece of
work, and how anyone could think
that primitive human beings
could have done this...
GIORGIO TSOUKALOS:
In Puma Punku,
the stone seems vitrified, too.
It is so smooth, it's as if
you touch a bathroom mirror.
That's how perfect it is.
The so-called "H-blocks" are,
in fact, shaped like dovetails
where there were
clear deviations
in the width
between the front and the back.
And possibly,
they held something in place.
The question is, what?
FOERSTER:
The great mystery
about Puma Punku
is that the local people,
the Aymara, have only
lived there for 900 years,
so they have no idea
of who made Puma Punku and when.
The Inca also didn't know.
No one, in fact,
on Earth knows
who built Puma Punku
and how far back in time
it was first constructed.
That's the great mystery.
TSOUKALOS:
Of all the ancient sites
we can find around the world,
I think that Puma Punku
is the only one
that was actually built
by extraterrestrials.
And perhaps
these extraterrestrials knew
that some time in the future
another generation would stumble
across this and wonder
how was such a thing
even possible,
forcing us to acknowledge their
existence in the remote past.
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