History: Naval researcher Dr. Dietrich Beischer tested effects of being upside-down for prolonged periods of time on a cat and mouse, 1958. [1024×699]

https://i.redd.it/c9wd16sorqf71.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/oz6wih/naval_researcher_dr_dietrich_beischer_tested/?utm_source=ifttt