Carey says scientists trying to back engineer a reasonable facsimile have had no success. The extraordinary properties are such that - to date - no substance exists that can produce identical results.  

Author  had just been contacted by a NEW witness who realized (while reading his book) she also saw a demonstration of the incredible "Memory Metal" and this is the first time he has shared that info. Cross fingers for details in his upcoming book: Roswell: the Verdict of History.