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Of the fabled Seven Wonders
of the Ancient World
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only the pyramids of
Giza remain-built
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more than 4,000 years ago.
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Nearly 500 feet tall
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they contain some
of the largest pieces
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of stone ever moved by
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humans-as much as 50 tons or more.
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Yet this was accomplished
without wheels or pulleys
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or even iron tools.
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How in the world did they do it
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without modern machinery?
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The gods certainly didn't do it.
:16:04
They used their minds.
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Knowledge built these great
great structures.
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Highly sophisticated knowledge.
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Look.
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All of the Giza pyramids are built
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in perfect alignment
with certain stars.
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That takes a knowledge
of astronomy.
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The pyramids' foundations are laid out
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in perfect angles
and dimensions,
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precisely correct for the height
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they wanted to reach.
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Now that takes
knowledge of geometry
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and mathematics.
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And finally,
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you must get these big stones
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from down here to up there
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and you must make them
all fit perfectly.
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Now that takes knowledge
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an incredible knowledge of
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engineering and organization.
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Organization?