[Guinness]

There's life out there, I have no doubt, the cosmos is simply too vast. Both the Fermi paradox and Drake equation sound perfectly plausible to me.

As for Alien visits, little green/grey men, abductions, crop circles and experiments on cattle, I'm a total sceptic.

Can't for the life of me find it on the interweb to give the link but I'm sure I once read a paper by Carl Sagan that described an approach by an alien craft to Earth.

The crux of it was, if I recall correctly, that any aliens scanning the planet would most likely regard us as parasites and vehicles as the actual lifeform.

I'm with Eric on this one, yeah there are plenty of UFO's out there but they are all of Earthly origin