I can believe we've been visited by ET and there are a few incidents that certainly appear to fall outside of standard explanations. The problem with
the 'alien intervention' idea is that humans have a genetic heritage that can be traced back much further than the '6000 years' you suggest. Even
the Sumerians had precursors. The archaeological record is a hell of an alibi for human development without any alien gene meddling...
Through 'haplogroups' and mitochondrial DNA it's possible to chart
population spread through the millenia. Our DNA is also shared, to some degree, with every living thing known to man. Bacteria, fruit flies, nematode
worms, chimpanzees and dolphin genomes show that we have evolved on this planet and without any obvious intervention from aliens. Have a look at this
excellent site...it's got video and straightforward graphics...Atlas of the
Human Journey
Our ancestor's ancestors are known. The Neanderthal genome has been mapped and reinforces the theory that we shared a common ancestor...
The progress we've made is recorded in the archaeological record. From stone hand-axes to military drones...our evolution is an endless series of
'baby steps' and adaptations to the environment and circumstances we find ourselves in.




