posted on Apr, 3 2011 @ 12:32 AM
As an engineer, if one looks at the history of development of technology, one can see all of these are 100% man-made. They all took lots of effort,
science, thinking, and design.
For example, anyone who tells me our current day computers are borrowed alien tech are ignorant of what a computer is, how its developed, and what it
actually does. The concept of a mechanical computer goes back to late 1800s! Look up Alan Turing, von Neumann, and other computer scientists and their
decades long work.
What engineers create is truly amazing but is limited based on our understand of physical laws. For example, why don't we have anti-gravitational
devices? We don't because we do not know how gravity manifests. This is why particle physicists are trying to observe something called the Graviton
(or the particle carrier of the gravitational force).
If we really interacted with aliens, we could have anti-gravitational devices and faster than light technologies. We do not have any technology that
transcends our current understanding of known physical laws. Therefore, we did not have intervention from races that are anymore advanced than us.