TIL researchers at the University of Georgia have built a device named the "Wasp Hound", which contains a parasitic wasp species trained to recognize various odors like explosives or drugs. The wasps are tracked by a computer which triggers an alarm when enough wasps seemingly focus in on a scent.
en.wikipedia.orgSubmitted by The_Critical_Cynic t3_1001i3q in todayilearned
The_Critical_Cynic OP t1_j2e01fp wrote
Reply to comment by Fast_Polaris22 in TIL John Steinbeck IV wrote an article in January 1968 about marijuana usage among the troops. This set off a media firestorm, & the Army began clamping down on marijuana usage, arresting ~1000 G.I.s a week for possession. Many G.I.s switched to heroin, which was odorless and thus harder to detect. by The_Critical_Cynic
Given the mental states of some of the people who came back, I could understand how one would be tempted to self medicate.