Well it does happen somewhat regularly. People (often from poorer countries) get on planes as stowaways. Most times they can only get into the wheel well, sometimes cargo holds. But they dont know that these non-passenger areas often aren't heated or pressurized and either freeze to death or suffocate during high altitude flight. Getting crushed in the wheel well during take off or falling out it during landing can also be deadly.
I'm always baffled how pointless that subreddit is. Almost every question asked there barely requires any math. Usually it's just look up two numbers and then do one basic operation. Or even worse, questions that aren't even answered by math at all.
The title of the study is "In a narcotic trance, or stimulants in Germanic communities of the Roman period"
Its literally the first result if you Google "Praehistorische Zeitschrift Stimulants". It's pretty easy to find.