If aliens do exist and they do in fact travel through the stars and other galaxies like some of us believe, they have to be moving at multiple times
the speed of light; multiples of C (if they want to get across the universe in days/months/years instead of millenia).
Since nothing can travel faster than the speed of light according to Einstein's theory, then there are only two possible explanations for how aliens
could be traveling through the cosmos at incredible speeds. Either our current understanding of physics is flawed and these beings have developed
newer theories and technology superior to our own OR these beings have found a way around the light barrier that do NOT defy our current laws.
Either way, in order to cross vast distances effectively, you have to be travelling faster than light because space is just so vast. It would be kind
of cumbersome for a civilization to become intergalactic if they were stuck with ancient technology like ours. Faster-than-light travel is the only
efficient way to travel through the stars. Let's say these beings have been able to break through the light barrier. What does this mean?
Well, for one, it means it doesn't matter if they send robots or themselves in their craft because UNLESS they have developed a way to PROTECT
everything inside their craft while traveling at these immense speeds, everything will become a splat the moment the craft goes from 0 to 186,000
miles per second in an instant.
Think of warp bubbles or shields. If they have the ability to protect things inside their craft from these speeds (or if you think of the Alcubierre
drive and they aren't even moving at all and space is just folding around them) then obviously it won't matter what type of entities are piloting the
craft, whether mechanical or biological (either way they'll be protected) and either way, they'll be at their destination almost instantly or at least
in a very short time.
So basically what I'm saying is the hazardous health effects of space travel only become a problem when you're implementing primitive technology to
travel through space. If these beings are as advanced as we think they are and they truly come from other star systems, then it doesn't matter who
they send. There will be no impact to their "health". They'll be here almost instantaneously!
However, this doesn't mean they can't send machines as probes to monitor us and accomplish tasks such as abductions, like you propose. It could be
that they do this because their machines/robots are protected against stuff in our atmosphere that perhaps they aren't. Who knows? Maybe they transfer
their consciousness into those mechanical bodies and use them as "hosts" and do everything themselves.
The possibilities are endless.
But just know one thing. Things such as "time, resources and distance" don't become a problem and will be insignificant to a civilization that has had
thousands of years to think about ways overcome these obstacles. We, on the other hand, have only just begun testing the waters and basically know how
to "crawl" in a vacuum.
edit on 16-10-2013 by Zeta_101 because: (no reason given)
edit on 16-10-2013 by Zeta_101 because: (no
reason given)
edit on 16-10-2013 by Zeta_101 because: (no reason given)
edit on 16-10-2013 by Zeta_101 because: (no
reason given)