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The original was posted on /r/todayilearned by /u/BiggieTwiggy1two3 on 2024-12-18 23:58:13+00:00.

Original Title: TIL during WWI, Allied soldiers used glowworms as trench lamps, storing the bioluminescent insects in bottles for light. Their service was so helpful, they were honored in 2004 when Princess Anne unveiled a London memorial for animals and insects that aided the war effort.