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25 Mysterious Discoveries That Science Still Can’t Explain
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00:00The world is filled with incredible discoveries, yet some of the most baffling ones have left
00:05scientists completely stumped.
00:07Forget the usual tales of the WOW signal or the Antikythera mechanism, this time I'm
00:12exploring mysteries that go beyond the norm.
00:14Ones that rarely make the headlines, but deserve your attention.
00:18For instance, why do we have anuses, or butts for that matter?
00:22Are animals secretly keeping our planet running?
00:24And what if our entire universe is just a fragile bubble in a false vacuum on the edge
00:29of collapse?
00:30I'm Mike with List25, and here are 25 mysterious discoveries that science still can't explain.
00:3625.
00:37The mystery of our anus and why we have big butts.
00:41It's not a question most of us ask every day, but once you start thinking about it,
00:45it's a head-scratcher.
00:47As The Atlantic's Catherine Wu pointed out, the evolution of the anus is a pretty big deal
00:52in the animal kingdom.
00:53Before it showed up, animals had to eat and excrete through the same opening.
00:56Not exactly efficient, right?
00:59The appearance of the anus allowed animals to evolve into larger, more complex shapes.
01:03But here's the kicker.
01:05Scientists still don't know which creature developed the anus first, or exactly when
01:08it happened.
01:09And since soft tissue like this doesn't fossilize, it's a tough mystery to crack.
01:15Oh, and why do humans have such big butts compared to other mammals?
01:19That's still up for debate too.
01:2124.
01:22What's hiding in the ocean's mysterious Twilight Zone?
01:25As you dive deeper into the ocean, sunlight starts to vanish.
01:29About 200 meters or 650 feet down, you enter the Twilight Zone, a region where sunlight barely
01:35reaches and our knowledge grows murky too.
01:37According to Andon Library from the Woods Hole Oceanic Institution, we know so little about
01:42this mysterious part of the ocean that it's easier to define it by what we don't know.
01:46What we do know is that this region plays a critical role.
01:50Some experts believe there may be more fish living in the Twilight Zone than in all other
01:54parts of the ocean combined.
01:56Plus, these deep sea creatures are thought to play a huge role in regulating our climate.
02:00But I'll get to that in a bit.
02:0323.
02:04The Puzzling World of Quantum Entanglement.
02:07Quantum Entanglement might sound like something from a sci-fi movie, but it's actually real.
02:11And scientists are still scratching their heads over it.
02:14Basically, it's when two particles are so closely linked that even if they're light
02:19years apart, what happens to one instantly affects the other.
02:22It's one of those phenomena that totally breaks our understanding of time and space.
02:26And here's where it gets even weirder.
02:29Researchers now think black holes could be entangled, potentially connecting them through
02:33wormholes.
02:34Some even suggest that space, time, and gravity could all be part of one huge quantum network.
02:4022.
02:41What will animals look like in the future?
02:44Trying to predict the future of evolution is tricky, but that doesn't stop scientists
02:48from imagining what animals might look like millions of years from now.
02:51According to Liz Alter, an evolutionary biologist, it's important to consider how humans are changing
02:56the environment today.
02:58With climate change, urbanization, and other human impacts, the future of animal life on
03:02Earth is bound to take some unexpected twists.
03:05While we can't be exactly sure what creatures will roam the planet, thinking about it gives
03:10us a fascinating glimpse of the unknown.
03:1321.
03:14The mystery of time itself.
03:16We all deal with time every day.
03:19But how much do we really know about it?
03:22There are plenty of theories, but the big question is still unanswered.
03:25What is time, really?
03:27Is it something we've just made up to track our days, or does it have a deeper role in
03:32the universe?
03:33And why does it only move forward?
03:35Could it ever run backward?
03:37We know how to move forward in time, just wait a year or two.
03:41But sending messages to the past?
03:43That still sounds like science fiction.
03:45Some scientists think time might be tied to game theory or something called cellular automata,
03:49but for now, it remains one of the biggest puzzles in science.
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04:2620.
04:27The Surprising Intelligence of Brainless Slime Mold
04:30Slime mold might look like a simple blob, but don't let that fool you, it's surprisingly
04:35smart for something without a brain.
04:37Technically, it's a single-celled organism, but when multiple slime mold cells come together,
04:42they form a massive network that can solve puzzles and even navigate mazes.
04:46What's even more impressive is its ability to make decisions based on risk and reward,
04:51and some evidence suggests it can even keep track of time, all without a brain or nervous
04:56system.
04:57How?
04:59Nobody knows.
05:0019.
05:01Is there intelligent life beyond Earth?
05:04The idea that intelligent life might exist elsewhere in the universe has fascinated us for
05:08ages.
05:09With the sheer number of planets out there, it seems possible, maybe even likely, that we aren't
05:14alone.
05:14But despite efforts like the SETI project, we still haven't received any definitive signals.
05:21So what's the holdup?
05:22There are a couple of theories.
05:25Maybe advanced civilizations have decided not to contact us, thinking it's a bad idea.
05:29Or maybe the messages are out there, and we just don't know how to detect them yet.
05:34Either way, we just don't have the answers.
05:3718.
05:38How long can humans really live?
05:40Is it possible that someone alive today could reach 150 years old?
05:46No one knows for sure.
05:47While the average human lifespan has increased over the years thanks to advancements in healthcare,
05:51we're not sure if there's an upper limit.
05:54Could someone live well into their second century?
05:57The technology and medicine that could make that possible might already be in the works,
06:01but if we figure it out, it raises some serious questions.
06:05For instance, how would society adapt to people living that long?
06:08What would that do to our current retirement planning and the job market?
06:12Maybe we'll find out in the near future.
06:1517.
06:16Are long-haul symptoms only a COVID-19 thing?
06:19Millions of people have experienced long-term symptoms from COVID-19, sometimes lasting for
06:24weeks or even months after they've recovered from the initial infection.
06:27But are these long-haul symptoms specific to COVID?
06:31Scientists can't seem to agree.
06:33While some believe it's unique, others argue that other viral infections can also leave
06:37people with lingering symptoms, though they've often been overlooked in medicine.
06:42Conditions like Chronic Fatigue Syndrome, for instance, have long been linked to viral
06:45infections.
06:46The common thread between these long-haul symptoms seems to be how the body reacts after the virus
06:51is gone, whether through persistent viral particles, reactivation of dormant viruses,
06:55or autoimmune responses that lead to ongoing inflammation.
06:5916.
07:00Why don't we know more about endometriosis?
07:04Endometriosis is a chronic condition where tissue, similar to the lining of the uterus,
07:08grows in other parts of the body, often causing severe pain.
07:11Despite how debilitating it can be, doctors still don't fully understand what causes it,
07:17and treatment options are frustratingly limited.
07:20To make matters worse, many people with endometriosis face dismissive attitudes from healthcare professionals,
07:25often taking years to receive a proper diagnosis.
07:29One of the biggest issues is the lack of research funding.
07:33Endometriosis has been historically underfunded and under-researched, and patients always leave
07:38waiting rooms in hospitals, feeling incredibly neglected.
07:4115.
07:42The mystery of a prehistoric leader's identity.
07:45In 2008, archaeologists uncovered a 5,000-year-old skeleton in a tomb near Seville, Spain buried
07:51with a crystal dagger and valuable artifacts, clearly indicating this individual held significant
07:56status.
07:58Initially thought to be a young man based on the pelvis bone, further analysis, using a
08:02more precise technique, revealed something surprising.
08:05The skeleton belonged to a woman.
08:07And that's where the real mystery probably began.
08:10Who was she?
08:11Why was she buried with such treasures?
08:13And what role did she play in her society?
08:16Despite all of our scientific advancements, the true identity of this prehistoric leader
08:21remains a mystery.
08:2214.
08:24Beethoven's health and a family secret.
08:27Ludwig von Beethoven died at 56 in 1827 after years of dealing with all sorts of health problems,
08:33hearing loss, digestive issues, and liver disease to name just a few.
08:37In 1802, he wrote a letter, the Heiligenstadt Testament, asking his doctor to figure out what
08:43had caused his illnesses after he died.
08:45Fast forward nearly 200 years, and scientists were finally able to honor that request by
08:49analyzing DNA from preserved locks of Beethoven's hair.
08:52The results?
08:54Well, they ruled out some conditions, like celiac disease and lactose intolerance, but instead
08:58of answers, they actually uncovered something totally unexpected, evidence of an extramarital
09:03affair somewhere in Beethoven's family tree.
09:06It caused a bit of a stir, but as far as solving the real mystery of his health, we're still
09:11left in the dark.
09:1213.
09:13How many species are there on Earth?
09:16Trying to pin down exactly how many species share our planet is a tricky business.
09:21Estimates are all over the place, ranging from 3 million to more than 100 million.
09:26Most experts tend to settle around 8.7 million, with about 6.5 million species living on land
09:31and 2.2 million in the ocean.
09:33But even that's just an estimate.
09:35We've only officially documented about 2.1 million species so far.
09:39The rest?
09:41We're still out there, waiting to be discovered.
09:4412.
09:45Could tiny lifeforms help us tackle climate change?
09:48I told you I'd get back to this idea.
09:51Just like we rely on the good bacteria in our gut for digestion, the soil beneath our feet
09:55is teeming with bacteria, fungi, and viruses that help keep it healthy.
09:59These tiny organisms are crucial for planet growth and soil health.
10:04But here's the thing.
10:05We barely know anything about most of them because they can't be studied easily in a
10:10lab.
10:10Yet, research shows that certain microbes can actually help trees grow up to 3 times faster.
10:16This raises an exciting possibility.
10:18Could these good microbes be some of our strongest allies in the fight against climate change?
10:23By promoting faster plant growth, they could play a huge role in absorbing more carbon
10:28and supporting food security in a warming world.
10:31The potential is there, but there's still so much to discover about their hidden powers.
10:3611.
10:37How do animals help shape our planet?
10:40We know animals do a lot for ecosystems.
10:43I mean, they're pollinating plants and spreading seeds for starters, right?
10:47But their role actually goes much deeper.
10:50They play their part when it comes to nutrient cycling and predator-prey balance, all things
10:54that are important to ecosystems, and we're only beginning to understand how it all works.
10:59For example, did you know that after a volcanic eruption, spiders help plants regrow by catching
11:04seeds in their webs?
11:05I mean, why didn't they teach us that in high school?
11:08So how far does their influence go?
11:10Could animals be shaping entire ecosystems, maybe even the planet itself?
11:15For now, we're still figuring that out.
11:1810.
11:19How many people can the Earth actually support?
11:22With the population growing by about 1 billion every decade, you have to wonder just how many
11:28more people can the planet handle?
11:30We're already seeing the strain.
11:32From habitat destruction to climate change and an increase in diseases spreading from animals
11:37to humans.
11:37As more people put pressure on the planet's resources, the big question is, where's the
11:43breaking point?
11:44Scientists have been debating this for years, but it's not a simple answer.
11:49It all depends on how we manage resources, food production, and our impact on the environment.
11:54Even then, the answer changes depending on countless factors, so it's not really a solid
11:59answer at all.
12:01If we figure out how to live more sustainably and in harmony with nature, Earth could support
12:06more people than we think, but if we don't make some changes, we could hit the limit sooner
12:12than we'd like.
12:149.
12:15The mystery of consciousness.
12:17Consciousness, our ability to be aware of ourselves and everything happening around
12:20us, might just be one of the biggest unsolved mysteries out there.
12:24Even with all the advances in neuroscience, we still don't fully understand how brain activity
12:28translates into things like thoughts, emotions, or self-awareness.
12:31This is what philosopher David Chalmers called the hard problem of consciousness back in 1995.
12:37The real question is, how do basic physical processes in the brain, like neural impulses,
12:43transform into something as personal as conscious experience?
12:46It's a mystery that scientists, philosophers, and even theologians are still trying to figure
12:50out.
12:518.
12:52The missing baryon problem.
12:55Astronomers have mapped out much of the universe.
12:57But there's still one big question, where is all the regular matter?
13:03This mystery is called the missing baryon problem.
13:06Baryons, the particles that make up ordinary matter, like protons and neutrons, seem to be
13:10in short supply.
13:11According to our calculations, a significant portion of them is just… missing.
13:16The latest research suggests these missing baryons might be hiding in the vast stretches
13:20of gas between galaxies, known as the warm-hot intergalactic medium, or WIM.
13:26But even though we have this clue, scientists still haven't quite figured out their exact
13:30location or nature, so the mystery isn't fully solved yet.
13:347.
13:35Was Einstein wrong?
13:37Okay, wait.
13:38Maybe we should first ask if Isaac Newton was wrong.
13:41His theory of gravity was solid enough to get us to the moon, but it breaks down when we're
13:45dealing with extreme speeds or strong gravitational fields like near black holes.
13:50That's where Einstein's general relativity came in and improved our understanding.
13:54It explains things like how light bends near massive objects and how space and time warp
13:59around black holes.
14:00But even Einstein's theory isn't above being questioned.
14:04Scientists have noticed some strange things that don't quite add up.
14:07Take the unexpected slowing down of spacecraft like Pioneer 10 and 11, something gravity alone
14:12can't fully explain.
14:14These odd little details suggest that there might be something missing in our current understanding
14:18of physics.
14:196.
14:20How should we measure evidence?
14:22The typical way of drawing conclusions from experiments, using statistical significance,
14:26has some serious flaws.
14:28Here's a quick example.
14:30If you run an experiment twice and get statistically significant results both times, you'd think
14:35that's stronger evidence than doing it once, right?
14:38Well, not quite.
14:39If the second result is just a little less significant, the combined p-value, the thing
14:45that tells you how strong your evidence is, can actually become less impressive.
14:49Weird right?
14:50It's confusing because you'd expect more data to strengthen the case, not make it weaker.
14:56The whole system can feel like a mess, and some experts believe game theory or other advanced
15:00mathematical approaches could eventually help make sense of it.
15:035.
15:05Genes, Cancer, and Bad Luck.
15:07You might have seen the headlines saying cancer is mostly caused by bad luck.
15:11That claim comes from a study in science that stirred up a lot of debate.
15:15The study wasn't saying everything about cancer is random, though.
15:18It simply pointed out that many cancers arise from random mutations that happen when cells
15:22divide, things beyond our control.
15:26Naturally, some people didn't like that interpretation, feeling it overshadowed the roles of lifestyle,
15:30genetics, or environmental factors.
15:33The reality is that scientists still don't agree on just how much of cancer is due to
15:37chance versus things like heredity, your genes, or lifestyle, smoking, diet, etc.
15:42It's a complex mix that science is still untangling.
15:454.
15:46Can we find order in chaos?
15:49Physicists have been scratching their heads for ages over how fluids, whether it's water,
15:53air, or gases, actually behave.
15:55The equations we use to describe their motion, called the Navier-Stokes equations, are so complicated
16:01that no one has fully solved them.
16:03We're not even sure if a general solution exists.
16:06And if it does, it might contain mysterious singularities, or points where things become
16:11totally unpredictable.
16:12So the big question is, is chaos, like turbulence in the atmosphere or the unpredictability of
16:18the weather, something we just don't understand yet?
16:20Or is it simply impossible to predict, no matter how advanced our math gets?
16:253.
16:26Can the forces of the universe merge into one?
16:29The universe runs on four basic forces, gravity, electromagnetism, the strong nuclear force,
16:36and the weak nuclear force.
16:37What's pretty mind-blowing is that if you crank up the energy enough, some of these forces actually
16:41start to blend together.
16:43Physicists have already seen the electromagnetic and weak nuclear forces unify in particle accelerators,
16:48and with even more energy, the strong nuclear force is expected to join in.
16:52But gravity?
16:53That's where things get tricky.
16:55So far, no particle accelerator, including the famous Large Hadron Collider, has enough
17:00power to bring gravity into the mix.
17:01The LHC operates at about 14 trillion electron volts, but we need something a trillion times
17:07stronger to even attempt unifying gravity with the other forces.
17:11Not exactly something we'll see in the near future.
17:14To make things more complicated, grand unified theories, which try to explain how these forces
17:19fit together, have their own problems.
17:21Some predict things like proton decay, where protons eventually break down, but we'll never
17:25see that happen.
17:26Others predict magnetic monopoles, isolated north or south poles, but no one's found
17:31any yet.
17:32So while it's possible that all forces could merge into one, it's a mystery we're still
17:36far from solving.
17:382.
17:39What exactly is gravity anyway?
17:41We've got a pretty good understanding of how most forces work.
17:45Electromagnetism is all about the exchange of photons.
17:48The weak nuclear force?
17:49It's carried by W and Z bosons.
17:51And gluons are responsible for holding atomic nuclei together through the strong nuclear force.
17:56All of these forces can be broken down into individual particles, which makes them easier
18:00to study.
18:01But gravity?
18:02Well, as you just heard, gravity is a bit of a rebel.
18:06Most theories suggest that gravity should be carried by a particle called a graviton.
18:11The problem is, we haven't found any yet.
18:14Even worse, if gravitons do exist, they interact with matter so rarely that they might be impossible
18:20to detect against the constant background noise of the universe.
18:23And if gravitons have any mass at all, it would be incredibly tiny, smaller than even the lightest
18:29particles we know, like neutrinos.
18:31Some ideas, like string theory, suggest that gravitons and other particles might actually
18:35be tiny loops of energy, but so far, the math hasn't given us much to work with.
18:401.
18:41Could we be living in a false vacuum?
18:432.
18:44The universe has been around for about 13.8 billion years, so it seems pretty stable,
18:49right?
18:50But what if all that stability is just an accident waiting to happen?
18:54The concept of a false vacuum suggests that empty space might not be in its lowest possible
18:58energy state, thanks to the Higgs boson and its field, which gives particles mass.
19:04Physicists like Alexander Kusenko think the calculations we've done so far hint that
19:08our universe could actually be in this false state.
19:11If that's true, the universe isn't as stable as we'd like to think.
19:16With enough energy from a major cosmic event, this false vacuum could shift into a lower
19:20energy state.
19:21That would trigger something called bubble nucleation, where a new bubble of true vacuum
19:26expands at the speed of light, wiping out everything, including matter as we know it.
19:31Eventually, the universe we live in could get replaced by a whole new one with different
19:35physical laws.
19:36It sounds bonkers and admittedly a bit terrifying, but don't worry.
19:40The fact that we're still here means that it's probably not something we need to lose
19:44sleep over.
19:45Still, it does make you wonder, did our universe begin because another one's vacuum popped
19:49and we're just a cosmic accident?
19:52Hmm.
19:52Well, that's a wrap.
19:54And if today's list got you thinking, then you'll love the video we did a while back
19:58on 25 incredible discoveries that science can't explain.
20:01I know the title is pretty similar, but the content is not.
20:05In that one, I explored the mystery of humpback whales, supergroups, the eerie years when the
20:09earth went silent, and the strange blobs deep inside our planet.
20:12If any of that sounds like your kind of mystery, then go ahead and click the link right here and
20:16I will catch you next time.
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