An idea worth pursuing I guess. My first question: in case this gets forgotten about in the distant future, how could it be marked so there’s a good chance of being found?
(Link to the AIBS journal article which inspired the question: https://academic.oup.com/bioscience/advance-article/doi/10.1093/biosci/biae058/7715645?login=false )
After the fall of humanity, the next intelligent species will think Black Rhinos were space faring.