This NASA audio debriefing captures a moment at 32:41 in which a speaker, while discussing correlations between experimental data sets, makes an off-hand remark: "Could be an alien starbase or something, I don't know."
This NASA audio debriefing from Apollo 16, recorded in Houston, Texas, includes a brief informal comment by one of the speakers.
At the 32:41 mark, while discussing correlations between experimental data sets, the speaker makes an off-hand remark: "Could be an alien starbase or something, I don't know." The record was released through the PURSUE declassification.