[Wuli]

anything on earth from a long time ago merely resembling how modern people imagine beings from other planets may look can be interpreted as being depictions of such beings even though many local factors and local abilities and local religious beliefs at the time of the paintings could have produced that resemblence while having nothing to do with physical beings from other worlds at all

modern people should not read too much into such images

their opinions about them may be more their own imginations than anything else

[DouglasKC]

anything on earth from a long time ago merely resembling how modern people imagine beings from other planets may look can be interpreted as being depictions of such beings even though many local factors and local abilities and local religious beliefs at the time of the paintings could have produced that resemblence while having nothing to do with physical beings from other worlds at all

Yup...try drawing this person:

Pagan tribes had all sorts of weird piercings and tatoos all through history (btw these are symptoms of a devolving culture). They would look weird enough in a drawing but no spacemen.

[COBOL2Java]

anything on earth from a long time ago merely resembling how modern people imagine beings from other planets may look can be interpreted as being depictions of such beings even though many local factors and local abilities and local religious beliefs at the time of the paintings could have produced that resemblence while having nothing to do with physical beings from other worlds at all

That's a very good point. One can posit that it's more a testament to the amazing power of man's imagination than the evidence of extraterrestrial visitors.