London: Even though official alien existence may never have been recorded, but their supposed preferred method of transport has come close to becoming a reality - flying saucers.
Detailed diagrams and sketches, which were released last month by the National Archives, show the mind-blowing military initiative, named Project 1794 to build an all-powerful fully-functioning flying saucer to patrol the skies.
In a 1956 memo it is acknowledged that the craft was to reach top speeds of 'between Mach 3 and Mach 4, a ceiling of over 100,000 ft. and a maximum range with allowances of about 1,000 nautical miles.'
Engineers working on the project got so far as initial rounds of product development and had begun prototype design before their endeavours crashed.
Had they been successful, a stratosphere-spinning saucer would have been unleashed, boasting speeds of up to 2,600 miles per hour and the ability to take off and land vertically, controlled and stabilised by propulsion jets.
That would have meant a trip from New York to Miami would have taken a mere 24 minutes.
The project wasn't always doomed to fail, in fact those involved were fairly certain they were on the right track.
The 1956 memo goes as far as to suggest that flying saucer development was going even better than anticipated.
"The present design will provide a much superior performance to that estimated at the start of contract negotiations," the Daily Mail quoted the memo as saying.
But perhaps that was just scientific optimism, or hopefulness rather, because the project was axed in 1960.
Continuing to prototype was priced at an estimated 3,168,000 dollars, or around 26.6 million dollars in today's money, quite a hefty price tag for a project not confirmed to succeed.
According to wired.com, attempts so far had failed miserably to reach the desired 100,000 feet in altitude.
In fact they struggled to get much more than five feet off the ground, so the military called it a day.