Human-Looking Aliens
Here is another possible reason for the high number of human-looking aliens.
Out of the great void came the universe, its galaxies, star systems
and suns. Everything that exists, and will ever exist, was spawned from
the primordial plasma of time's beginning. Over billions of years,
planets formed, and life arose through a steady progression of
increasingly complex organisms. Woven into and intertwined with all of
this - from the smallest molecule to the largest star - are patterns of
space-time known as "morphogenetic fields".
Morphogenetic fields
are non-physical blueprints that give birth to forms. A morphogenetic
field, is an equivalent to an electromagnetic field that carries
information only, not energy, and are available throughout time and
space without any loss of intensity after they have been created. They
are created by the patterns of physical forms and help guide the
formation of later similar systems where a newly forming system "tunes
into" a previous system by having within it a "seed" that resonates
with a similar seed in the earlier form. Thus, the DNA in the genes of
a living system does not carry all the information needed to shape that
system, but it can act as a "tuning seed" that tunes in the
morphogenetic fields of previous systems of the same type.
Since
morphogenetic fields are reinforced by every successive generation,
most habitable planets in the galaxy evolved with many physically
similar lifeforms (e.g. fish, trees, insects), and on many of those
worlds with at least one sentient species with a humanoid configuration
(bilaterally symmetrical, upright posture, two arms, two legs, hands,
feet, one thorax, a neck a head with a brain located in it). The first
sentient life to form in the universe was a humanoid species and they
established the morphogenetic field for all humanoid species throughout
this universe, insuring they would evolve on other planets.
A
significant percentage of those species are outwardly indistinguishable
from humans, right down to such physical minutiae as the same
ethnological phenotypes, hair patterns, fingernails and even
cartilaginous foldings of the nose and ears. The reason they are so
astonishingly similar to the human race is because the "human form" is
the same physiognomic archetype of the first humanoids and therefore
represents the basic way that evolution most likely takes for the
dominant sentient mammalian species on an average Earth-like planet
under the influence of the morphogenetic field and the other humanoid
races evolved under very specific and usually unique environmental
conditions that would have been inhospitable to the human form during
the evolutionary process.
(Theory by Progenitor)