A footprint wasn’t the only thing that Neil Armstrong left on the Moon.

Amongst the list of things we have left on the Moon are four “defecation collection devices”, four “urine collection assemblies” (two small, two large) and four emesis (sick) bags.

If you’re interested – really, you are? – then check out Chapter 2 of Section VI of NASA’s Biomedical Results of Apollo report which – and I can barely believe I’m writing this – goes as far as to list the average mass of returned fecal samples.