(mysterious noise)
- Number five, UVB-76.
UVB-76 is a mysterious shortwave radio station
that only broadcasts on a very narrow frequency.
UVB-76 transmits a short buzzing tone
25 times per minute, every single day.
On very rare occasions,
the buzz is interrupted by cryptic messages in Russian.
(Russian radio transmission)
This mysterious shortwave radio station
broadcasts from inside the Russian Federation.
But its actual purpose has never been determined.
(Russian radio transmission)
Number four, the loneliest whale.
In 1989, researchers detected this strange signal
emanating from the oceans.
The signal sounds like the call of a whale
but is a much higher frequency
than the frequency that whales usually communicate with.
Scientists have tracked the movement patterns
of this strange sound, and it matches no known whale species,
leaving them speculate that the lonely whale
has a bazaar mutation.
To this day, the lonely whale
can be heard screaming into the ocean,
never to be heard by another whale.
Number three, the Backwards Music Station.
What you are listening to is known simply as
the Backwards Music Station.
The Backwards Music plays a loud, grating sound
and several high pitch whines in the background.
It has been suggested that the station
is used to communicate with U.S. agents operating undercover.
The frequencies used are very similar
to the frequencies used by the U.S. Navy,
and they appear to emanate
from bases in Jacksonville, Florida, and Virginia Beach.
But at the same time,
a source of these mysterious radio waves
has been located in England,
suggesting that perhaps these signals
could possibly be a top secret NATO frequency.
Regardless of its purpose,
the Backwards Music Station has no discernible schedule
and often disappears for long periods of time.
Number two, the Wow! signal.
In 1973, the Ohio State University Radio Observatory
began scanning the skies for the slightest traces
of extraterrestrial transmissions.
And in 1977, the first astonishing signal
they received wasn't a whimper but a roar
that was never to be heard again.
The Wow! signal was a strong narrowband radio signal
that has all the hallmarks of an artificial transmission
from extraterrestrial life.
Lasting just 72 seconds, the Wow! signal appears
to have originated from the globular cluster M55
in the constellation Sagittarius
which is located over 17,000 light-years away.
This signal was so bezaar that the researcher listening
quickly wrote down the word "Wow!"
to express his uncontrollable excitement.
To this day, the Wow! signal remains
the first and only known time
humans have received an extraterrestrial signal
of an artificial origin.
Number one, Operation Wandering Soul.
Operation Wandering Soul was a propaganda campaign
undertaken by U.S. Forces during the Vietnam War.
The operation took advantage
of the Vietnamese legend of the wandering soul.
The "wandering soul" is the Vietnamese belief
that the dead must be buried in their homeland.
And if they were improperly buried,
their soul will wander aimlessly in pain and suffering.
To prey on this, U.S. engineers created
this disturbing recording and broadcasted it into the jungle.
They hoped that these disturbing sounds
would demoralize and drive away Viet Cong fighters.
The recording proved to be so effective
that U.S. Forces were instructed
to never play this recording within earshot
of their South Vietnamese allies
because it'd demoralized them as well.
(Vietnamese recording)
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