The
sphinx and pyramids are the subject of a number of ridiculous
pseudo-scientific theories based on little more evidence than
"Wow, there's a really impressive old big thing - here's a fairy
story about how I reckon it got there...". These monuments were
built over a long time period - several decades. The man power
has been proven to be available as a result of the richness of
the soils surrounding the Nile flooding once a year. This meant
that there was sufficient food to be stored against famine and a
time of the year when the population was idle so allowing it to
be used for large scale religious projects such as building the
pyramids and sphinx.
It is
well accepted that the labour was not slave labour, but supplied
by temporarily enforced idle agricultural workers - and so more
dependable and motivated.
The
dimensions, alignment and precision of the pyramids is easily
within the technology of the age and doesn't need alien cultures
or other kinds of magic to explain it. That such things are
called upon is more a case of ignorance and love of
sensationalism in the writer.
The
sphinx and pyramids were conceived and executed by the human
mind, ingenuity and muscle power - and so are all the more
believable and impressive as a result.