posted on Apr, 4 2006 @ 08:23 PM
First off no one knows if any of these monsters really exists. Secondly what if aliens aren't like the greys at all. i mean as stories of reptillians
grew so did sightings and abductions which means how accurate is the information we receive from eye witnesses and victims etc.
As for evolution it takes a long time to evolve but over time or even genetic modification it coyld be acheived.