Savage mentioned bilberry (a relative of blueberry) as being used for vision, and mentioned in a past show that it was used by british bomber pilots during WWII for night raids. I mentioned this to a knowledgable doctor who said that the use of bilberry was a cover story the british military floated to conceal their discovery and use of radar from the nazis.
“cover story the british military”
Pretty cool
Fill-in nation today
The same physician mentioned above had patients with concentration camp tattoo serial numbers on the forearms.