There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
There is a 600 year old 240 paged book called the Voynich Manuscript, that’s written language is still completely unknown today.
15
In 1987, a Chicago TV station had its broadcast interrupted by a pirate signal that shows a man in a Max Headroom mask mumbling and being spanked with a fly swatter. Despite investigations by the FCC and FBI, this became the only known incident in which a hacker interrupted a major TV broadcast without getting caught.
19
There is an island near Italy that was the site of wars, a dumping ground for plague victims, and an insane asylum. It's considered so dangerously haunted that the Italian government does not allow public access.
78