00:00So, what do you like to listen to?
00:03Music?
00:05Podcasts?
00:06Maybe the sound of rain, or the crackling of a campfire.
00:11But what about listening to the ocean?
00:13Not the familiar crash of waves on the shore,
00:16but sounds captured deep on the cold ocean floor.
00:20Sounds that send chills down your spine.
00:23Sounds of something big, dark, and possibly alive.
00:28And the most unsettling part is this.
00:31The true nature of some of these sounds remains a complete mystery to this day.
00:37In 1997, something strange echoed through the Pacific Ocean.
00:42Deep beneath the surface, far off the coast of South America,
00:46a sound appeared so powerful that it instantly unsettled scientists.
00:51It was ultra-low in frequency, massively loud, and unlike anything recorded before.
00:57The signal was later given a simple name.
01:00The bloop.
01:02At first glance, the bloop sounds harmless, almost playful.
01:07But what it represented was anything but.
01:10It was so intense that it could be detected by sensors nearly 3,000 miles away.
01:17Imagine standing in New York and hearing something happening in Los Angeles.
01:20Now imagine that noise traveled through deep ocean water.
01:25Terrifying marine life and oceanographers.
01:28Whatever produced it had to be enormous.
01:31The signal carried patterns that felt like its source was some living creature.
01:37Whales were the first suspects.
01:39But even the blue whale, the largest animal in the world,
01:42simply couldn't generate a sound that loud.
01:44The numbers didn't add up.
01:47And that's when speculation took over.
01:50If something could produce the blue,
01:52it would have to be larger than anything swimming in today's oceans.
01:56People began imagining creatures of impossible size.
02:00Ancient sea monsters.
02:02The kraken.
02:03Some even whispered about the megalodon,
02:06a prehistoric giant shark thought to have gone extinct millions of years ago,
02:10and featured in dozens of videos right here on the Bright Side.
02:14The mystery only grew deeper when scientists mapped the approximate location of the sound's origin.
02:20It came from a region close to Point Nemo, the most remote place on Earth.
02:26This spot in the Pacific Ocean lies more than 1,000 miles away from the nearest land in every direction.
02:33It's so isolated that it's often called the oceanic pole of inaccessibility.
02:38Point Nemo is a place few humans will ever see.
02:42Because of its remoteness, it has become a kind of graveyard for defunct satellites and space debris.
02:48When spacecraft are decommissioned, they are often guided to fall into these waters.
02:53It's quiet, empty, almost untouched.
02:56And yet, something powerful had screamed from nearby.
03:02For fans of cosmic horror, this detail felt oddly familiar.
03:08In the fictional universe of writer H.P. Lovecraft,
03:11the ancient sunken city of Relyae lies beneath the ocean near this very region.
03:16According to the stories, Relyae is where the monstrous entity Cthulhu sleeps.
03:22It's a powerful, scary, intelligent creature lying dormant for thousands of years,
03:27ready to awaken and bring about the end of the world.
03:30Of course, Cthulhu is pure fiction.
03:34Lovecraft never claimed otherwise.
03:35But once the internet made the connection,
03:39the idea took on a life of its own.
03:41But science eventually caught up.
03:45The bloop recording is still easy to find online.
03:47You can listen to it yourself.
03:49But it sounds so innocuous that you'll probably be disappointed.
03:54And today, we know with certainty that it didn't come from a living creature.
03:58Researchers later confirmed that the sound was produced by ice.
04:04Specifically, by an ice quake.
04:08Now, ice quakes occur when enormous icebergs fracture, crack, and break away from glaciers.
04:14When this happens, they release tremendous amounts of energy,
04:17generating ultra-low-frequency sounds that can travel across entire ocean basins.
04:23These sounds are similar to biological calls,
04:26especially when recorded from far away and distorted by water.
04:30In fact, scientists compared the bloop to other known ice quake recordings
04:34and found striking similarities.
04:37The source wasn't a monster.
04:39It was Antarctica itself during shifting, breaking, and reshaping.
04:44For many people, this idea brought mixed emotions.
04:48On forums like Reddit, some openly admitted they preferred the idea of a giant unknown life form.
04:55Yup.
04:57Another strange sound was captured in the early 1980s,
05:01deep in the South Pacific, during a scientific expedition near New Zealand.
05:06Researchers were exploring the South Fiji Basin,
05:09where the ocean floor lies more than two and a half miles beneath the surface.
05:12There were short, sharp, repeating noises echoing through the water.
05:18Four distinct bursts, each one sounding uncannily, like a duck's quack.
05:24So, researchers called it the bio-duck.
05:27The sound was rhythmic and consistent.
05:30Eventually, the team concluded that the source had to be biological.
05:34But identifying exactly what made the sound proved impossible.
05:38After sharing the data with colleagues in Australia,
05:42did they realize something even stranger?
05:45Similar sounds had been recorded in other parts of New Zealand and Australian waters.
05:51Decades later, the mystery remains unsolved.
05:54Some scientists believe the quacks may not be random at all.
05:59They could be a form of communication.
06:01Perhaps the sounds may come from Antarctic minke whales,
06:05though no direct proof exists.
06:08Scientists also noticed that there were several sources of sounds,
06:12and when one source spoke, the others fell silent, as if they were listening.
06:17It may have been a conversation echoing through the deep,
06:20in a language we still don't understand.
06:23Imagine a terrifying alarm blaring inside a secret laboratory,
06:29announcing that a monster from another planet has broken free.
06:33It's an ugly sound.
06:35Loud, piercing, and oppressive.
06:38The kind that makes your skin crawl.
06:40In August of 1991, scientists recorded something eerily similar.
06:45Not in a lab, but deep beneath the Pacific Ocean.
06:49Across vast areas of the ocean,
06:52a strange, repeating signal began to appear at different times.
06:56It consisted of narrow, rising tones that lasted several seconds each.
07:02Researchers named this sound upsweep.
07:05It's detected most often during the spring and fall,
07:08leading scientists to believe it may be connected to seasonal environmental changes
07:13or changes in the source itself.
07:16But what exactly was producing it?
07:19No one knows for sure.
07:22The only thing scientists can say, with confidence,
07:25is that upsweep appeared near areas of suspected volcanic activity.
07:29But if this sound is natural, why does it seem so precise?
07:34So consistent?
07:36It almost feels artificial,
07:38as if a secret underwater facility is periodically broadcasting a distress signal
07:43from the depths of the ocean.
07:45Since its discovery in 1991,
07:48the upsweep signal has gradually weakened,
07:51making it one of the strangest and most unexplained phenomena
07:55ever recorded beneath the ocean.
07:58Now, there's another mysterious sound known simply as slow down.
08:02True to its name,
08:07this signal steadily decreases in frequency over seven minutes
08:11before fading into complete silence.
08:14It was recorded in May 1997 on a hydrophone array,
08:19located in the eastern equatorial Pacific Ocean.
08:22At first, slow down doesn't seem especially loud.
08:26But here's the chilling part.
08:29It was picked up by three separate sensors placed nearly 3,100 miles apart.
08:34Imagine how deafening and terrifying it was near the source itself.
08:38So, what caused it?
08:41The most widely accepted theory suggests that a massive drifting iceberg
08:46slowly came to a stop and ran aground.
08:49The idea is surprisingly plausible.
08:52A colossal block of ice is scraping along the seafloor,
08:55grinding forward until it finally halts.
08:58The location supports this theory as well,
09:01since the sound originated near shallow waters and small islands.
09:04Because of this, many scientists classify slow down alongside the bloop
09:10as a cryogenic noise caused by ice.
09:13Still, it remains just a theory.
09:16Officially, the sound has never been identified.
09:20And there's yet another eerie recording from the ocean.
09:24This one sounds like a moan,
09:26but scientists named it whistle.
09:28Go figure.
09:29It was recorded in 1997
09:34and gives the unsettling impression
09:36that something enormous is sitting on the ocean floor
09:39and whistling.
09:41Researchers believe that something could be an underwater volcano.
09:46When they compared the whistle signal
09:48to previously recorded volcanic sounds from the eastern Pacific,
09:52they found them very similar to each other.
09:55Most likely, all these sounds are of a natural source.
09:59Volcanic eruption or iceberg collision.
10:02But it's still pretty scary to hear something like this while driving.
10:06It would be especially unpleasant
10:08to be directly above an erupting underwater volcano.
10:11Well, yeah.
10:14That's it for today.
10:15So hey, if you pacified your curiosity,
10:17then give the video a like and share it with your friends.
10:20Or if you want more,
10:21just click on these videos and stay on the bright side.
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