That's an interesting article Patrick posted. A major impediment to interstellar travel that's often brought up in debates about UFOs is the vast distance between the stars. Assuming the speed of light is a limit that can't be exceeded and or even approached very closely, that requires interstellar travel to take years -- sometimes many years. But what if some aliens live as long as bristlecone pines? Spending 100 years to travel from one solar system to another might not seem excessive to them. It might be 1/40 of a lifetime, equivalent to about two years for many of us. Many folks would volunteer to go -- two years there, two years back. Or what if they have a wonderful form of suspended animation? Or suppose they have mastered wormhole technology and can just zip between the galaxies with ease? Is there any likelihood that UFOs could be real? Anyone? Thanks, Joe