Dr Boyd Bushmanmade the extraordinary claims in his last ever interview and showed pictures ofwhat he alleged were extra terrestrials.
He said people at the secretive USair base are studying UFOs 24 hours a day and that he helped develop flyingsaucer technology for a major defence firm.
scientist's claims were made in a videorecorded days before his death in August and posted recently to YouTube.
Mr Bushmansaid: "With respect to the alien craft, we have American citizens who areworking on UFOs 24 hours a day.
He said there are two groups of aliensbeing studied at the Area 51 military base in the Nevadadesert, America.