In the 1960s, NASA commissioned Grumman Aircraft to build 15 space-worthy lunar modules, or LMs, for its Apollo program.

The fate of 14 modules is well-documented, but the last - LM-14 - is harder to account for in historical records. We attempted to track down and piece together the mystery of the seemingly missing moon lander.

Most experts we contacted weren't sure where it had gone, but we finally got a convincing answer (with documentation) from one space historian and artist.

• He believes the lander was scrapped and its aerospace-grade metal possibly reused in jet fighters.