Two Men Found Dead Wearing Lead Masks

In 1966, two electronics technicians were found dead on a remote hill in Brazil — wearing lead masks and carrying a mysterious handwritten note.
The note read:
“16:30 be at the appointed place.
18:30 swallow capsules.
After effect protect metals wait for signal.”
There were no signs of violence.
No cause of death could be determined.
And no one has ever explained what the men were trying to do.
Were they conducting a scientific experiment?
Performing a ritual?
Attempting contact with extraterrestrial life?
The Lead Masks Case remains one of the most chilling unsolved mysteries in modern history — a case that blends science, spirituality, and death into a single unanswered question.