If you want to put unsubstantiated rubbish like this on your otherwise wonderful web site, do a service to the Science section by removing it, and then put the article in a section labelled "Pseudo-science", because that's what it is. Subjects such as this that rely so very little on facts ought not to be put on a world-wide news site.
Matthew, UK

My wife thinks I'm nuts, but I firmly believe that there is an answer out there. It seems inconceivable that within this universe we are the only sentient life form; it also strikes me as being an enormous waste of space, and, as we all know, Mother Nature hates waste. I hope they come back in my lifetime; I just hope we don't mess up the contact.
Doug Craig, Virginia, USA

I believe in Time Travel. Therefore I believe these aliens as we call them come from our future, and they are visiting their past, our time. The earth as we know it does not exist.
Charles D. Immekus, USA

The conspiracy theorists point to things like the US government's determination and ruthlessness in covering up the 1947 crash. Why else, argue the UFOlogists, would the US government engage in such systematic abuse of citizens? Many find it easier to believe in alien visitations than the reality that our government and its high officials have learned to lie regularly about all sorts of things as a matter of course. For various reasons, they are perhaps less frightened by the former than the latter.
Mark Lause, Ohio, USA

The Roswell mystery is, in fact, true. I was there when Nessie shot it down. Best wishes to all who need something to hang their hats on.
Clive Elsbury, S Wales.

It is so obvious there has been a cover up why not admit it for the good of the world
Stuart, Brisbane, Australia

I have worked with military students from many countries, teaching English as a foreign or second language for more than 30 years and have sometimes asked them their opinions regarding UFOs. Around 1972 I taught all the military officers assigned directly to Colombian president Pastrana Borrero (father of the present president) in La Casa Militar in the presidential palace in Bogota.

On one occasion I could not resist asking them if they thought the most likely explanation for the more reliable UFO reports was that we are being observed by extraterrestrials. I was fascinated when they all answered in the affirmative. Several years later after returning to the US, I asked a colonel in the Colombian Air Force if he had ever been given a briefing in which he had been told we are being observed by extraterrestrials, and he answered in the affirmative. (This sort of briefing seems to have only been given to those at the highest level in their military) Such responses from seemingly credible, reliable military personnel over the years, for me, tends to reinforce the belief that there most likely was a crash of an extraterrestrial craft near Roswell in 1947.
Cliff Gieseke, Texas, USA

If you've ever driven through Roswell, New Mexico, you'd have been better off driving around. Main Street is about five miles long and about a block deep on either side. Much like the town, the people who live there are long and narrow and not very deep. If you've ever driven through Roswell, you would know why they invented aliens.
Roy B. Conant, USA

My wife thinks I'm nuts, but I firmly believe that there is an answer out there. It seems inconceivable that within this universe we are the only sentient life form; it also strikes me as being an enormous waste of space, and, as we all know, Mother Nature hates waste. I hope they come back in my lifetime; I just hope we don't mess up the contact.
Doug Craig, Virginia, USA

I believe in Time Travel. Therefore I believe these aliens as we call them come from our future, and they are visiting their past, our time. The earth as we know it does not exist.
Charles D. Immekus, USA