Look! Up in the sky!

[Jack Sawyer]

"Regarding the UFO debate, Sagan presented a scientific approach...

Interesting you would mention Sagan. From the Wiki article above:

"In Carl Sagan's novel Contact and subsequent 1997 film starring Jodie Foster and Matthew McConaughey, Foster's character Ellie travels 26 light years through a series of wormholes to the star Vega. The round trip, which to Ellie lasts 18 hours, passes by in a fraction of a second on Earth, making it seem that she didn't go anywhere. In her defense, Foster mentions an Einstein-Rosen bridge and tells how she was able to travel faster than light and time. Analysis of the situation by Kip Thorne, on the request of Sagan, is quoted by Thorne as being his original impetus for analyzing the physics of wormholes."

Contact is on my Favorites Ever Movies list

It took our planet half it's life for us to pop up. It's taken us 2 million years to develop the means to send probes to the outer reaches of our solar system. It's hard for me to imagine that another planet some where has lasted long enough to develop the lifeforms capable of traveling distances of light years and to do it in a manner which we can't sense.

The sum total of technology we've developed so far has happened in an eyeblink relative to our time on Earth as a distinct species. It's not unfathomable that we could develop the technology to traverse interstellar distances within the next few hundred years.

It is theoretically possible:

http://en.wikipedia.org/wiki/Wormhol...able_wormholes

Assuming the laws of physics are universal, other intelligent species - that I, for one, believe do exist throughout the universe - will eventually arrive at the same conclusions and strive to solve the problem. I don't think it's unreasonable to presume that some have beat us to it.

This should be true, unless they are overrun by some odd sort of religion and outright deny the existence of "others"... like some on a certain planet...