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Dive into the mind-bending realms of science as we unravel the most disturbing solutions to the Fermi Paradox, explore how multiverse theory is gaining scientific traction, and investigate the possibilities of achieving true anti-gravity. This journey challenges our understanding of reality and the universe itself.
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00:00You're one of over 8 billion people alive on Earth.
00:03Let's zoom out.
00:04Our planet is just one of 8 planets in our solar system.
00:08In the galaxy, our neighborhood is just one of almost 4,000.
00:13And from what we know so far, there are billions of galaxies in the entire universe
00:17that itself may also be growing.
00:20It's highly unlikely that we're the only living creatures in the universe.
00:24Surely, there must be some other habitable planet.
00:28Here's where the Fermi Paradox comes in.
00:31The idea got its name from a man named Enrico Fermi.
00:35Back in the 50s, he pointed out that if other lifeforms were out there
00:40and had the tech to travel through space, they should have visited us by now.
00:44These days, we have better telescopes that allow scientists to discover
00:48over 5,000 planets outside our solar system.
00:51Yet, still no sign of life.
00:55Throughout the years, there have been many suggested solutions to the Fermi Paradox.
00:59These outer world beings may be just too far away for a friendly chat.
01:04We've seen it in movies.
01:06Spaceships traveling between stars as easily as cars on a highway.
01:10But in reality, making a way through space is a slow and cumbersome process.
01:15Even our fastest rocket would take thousands of years to reach a nearby star.
01:19When you add in the vastness of the cosmos, it's like trying to find a living needle
01:24in the biggest cosmic haystack available.
01:29Now, we could just as easily be the very first civilization to emerge in the universe.
01:34It's a lonely thought.
01:35And it also puts a lot of pressure on us.
01:38If we're the only ones, we need to preserve life on our planet.
01:42Not just for our sake, but also because if we fade away, all life fades away with us.
01:48The universe has been around for billions of years.
01:51But intelligent life like ours has only existed for a tiny fraction of that time.
01:56Maybe we're just early bloomers, waiting for someone else to catch up.
02:00To support this theory, the study was done in 2015 using the Hubble Space Telescope.
02:06And this is what it showed.
02:08Out of all the worlds that could sustain life, only 8% are as old as the Earth.
02:13The rest of them are too young and still haven't reached that point in their evolution for life to thrive.
02:20There could also be the possibility that our galactic relatives are watching us from afar.
02:26A scientist from another planet may be studying us as primitive lifeforms right now.
02:32He may not want to disturb us just yet.
02:34The same way we look at ants in an ant farm during science class.
02:38On that same note, maybe they're just not ready to interact with us because they've calculated a precise, perfect timing
02:46for our meetup.
02:47So they're lying dormant in a hibernation status.
02:50And they might be right to do so.
02:53Why rush into things when we've got all of eternity ahead?
02:56There's also the idea that our planet and us humans just aren't cool enough for others to play with.
03:02And won't be until we're evolved enough to be welcomed into the galactic high school's senior class.
03:09Or perhaps life is more fragile than we believe.
03:12So even if life has existed in the universe every now and then, it never evolved to a stage where
03:18it could have contacted us.
03:21And what if life's ultimate test comes much later?
03:24Several thinkers believe that civilizations tend to destroy themselves at some point in their technological evolution.
03:30And this may be a potential future for us, too.
03:34We're just not there yet.
03:36Maybe we'll come to build technology so smart and so powerful that it will overwhelm us, leading to our demise.
03:43Well, if it can happen to us, who's to say it didn't happen to other species in the past, on
03:49other planets?
03:50Amidst all these theories, there's one possibility that's both sobering and profound.
03:55We may truly be alone in the universe, forever.
03:59Perhaps the conditions for life are so rare that Earth is the only oasis in a vast desert of emptiness.
04:07The creepiest answer to the Fermi Paradox has a name, though.
04:11And it's called the Dark Forest Theory.
04:13It first appeared in the 1980s.
04:16According to it, the universe is a huge version of a haunted forest.
04:20And other types of creatures are out there playing a game of hide-and-seek.
04:24It's the expanded version of the survival of the fittest.
04:27History on Earth shows that less technologically advanced groups usually end up worse off when meeting more advanced ones.
04:35The huge differences in technology often lead to a situation where attacking first seems like the best option.
04:42If there's even a small chance that cosmic neighbors might harm us, destroying them first could be our only hope.
04:49So, if the galaxy is full of advanced life, it's smart for us to stay quiet and avoid contact.
04:55Other civilizations would probably reach the same conclusion.
04:59Even peaceful ones might feel forced to attack to survive.
05:03That's why some scientists criticize the idea of sending messages out there and think searching for them might be pointless.
05:10But this idea isn't new.
05:13A story from the 40s called First Contact describes humans meeting other types of civilizations for the first time.
05:20The two groups became friends but can't risk letting each other find their home planets.
05:25They'd rather destroy each other than risk their safety.
05:29Another story, The Forge of God, talks about the danger of our signals reaching hostile species.
05:35It compares Earth's broadcasts to a baby's cries attracting wolves.
05:40It suggests that we might be in danger because of our naivete.
05:44The dark force theory was also explored in a radio play called Calls from Far Away.
05:50It shows how discovering otherworldly life on Pluto changes people's views.
05:55Some claim the news is fake.
05:57Others try to understand the reality that we're not alone.
06:01But it also suggests that maybe we should focus on our own problems instead of reaching for the stars.
06:08If that doesn't sound scary, this will.
06:11We've been sending signals of our existence into the cosmos for decades now.
06:15By now, any potential civilization within a hundred light-years of us might be getting our signals.
06:21And if they're advanced enough, they'll know exactly where to find us.
06:25If there's any reason why we need to hide from them, it's already too late.
06:31Galactic cousins aside, we do need to continue our research for habitable planets for a more pressing reason.
06:38Our cozy Earth won't be here forever.
06:40When our star fades, all life within the solar system will fade with it.
06:46Current estimations claim we've got about 1.3 billion years left before our planet becomes uninhabitable.
06:53It will become too hot for water to exist.
06:56And without water, there is no life.
06:58At least, not as we know it.
07:00So, it begs the following questions.
07:03What if there are other types of creatures out there that don't need water to exist?
07:08Our type of life needs water because it acts as a solvent.
07:11It's an environment where various chemicals can interact with each other to generate something that lives.
07:17Some new piece of research suggests that there may be a substitute for water out there in the universe.
07:23At certain temperatures and under a certain amount of pressure, it acts the same way, allowing chemicals to mingle.
07:31If that's true, then our list of known habitable planets would increase dramatically.
07:37Sure, we humans will probably never be able to survive on their surface, but other creatures may have evolved to
07:44do so.
07:44One planet that may feature these weird life conditions is closer than we think, Venus.
08:01If the multiverse theory is correct, ours is not the only one out there, which is as interesting as it
08:08is scary, right?
08:11Now, not every scientist is on board with this mind-bending concept.
08:15And let's be honest, the idea of actually making contact with these parallel universes sounds about as probable as winning
08:21the lottery while riding a unicycle.
08:25But hold on tight, because this strange concept isn't just limited to the realms of fiction anymore.
08:31Believe it or not, a bunch of scientific theories actually support the existence of parallel universes.
08:37And let me tell you, it's a topic that stirs up quite the debate in scientific groups.
08:43Now, picture this. The universe we live in is mind-numbingly vast.
08:47We're talking billions, some say even trillions, of galaxies swirling around, each packed with an almost uncountable number of stars.
08:56Some brainiacs studying the universe's shape suggest that its diameter could span a staggering 7 billion light-years.
09:02Others even argue that it might be infinite.
09:06Could there be more out there than meets the eye?
09:09Well, real scientific theories are exploring the possibility of universes existing alongside, beyond, or even mirroring our own.
09:18These intriguing concepts of multiverses and parallel worlds often intertwine with other, more familiar scientific ideas like the Big Bang,
09:27string theory, and quantum mechanics.
09:31In order for us to figure out what's out there, we have to rely on the information we're a bit
09:36more confident in, right?
09:40Let's rewind the cosmic clock about 13.7 billion years ago.
09:44Everything we're able to see today was squished into a minuscule singularity.
09:48Then, if the Big Bang theory is to be trusted, it all went boom.
09:53The universe inflated with a speed faster than that of light everywhere, within less than a second.
09:59The way the universe went pop has led some clever researchers to ponder the existence of more than one universe.
10:07They question whether that sudden growth ended everywhere at the same time.
10:11While the expansion ceased for everything we're able to see from Earth 13.8 billion years ago,
10:16cosmic inflation might still be ongoing in some other mysterious corners.
10:22Some theoretical physicists say that as inflation ends in one place, a new balloon universe forms.
10:28But here's the catch.
10:29You can't just hop from one bubble to another like intergalactic tourists.
10:32These bubble universes are expanding indefinitely,
10:35and their edges are zooming away from us faster than light can travel.
10:40And here's where things get even more confusing.
10:42Let's say we somehow manage to reach the edge of our local balloon and encounter the next universe.
10:49Well, those same theoretical physicists mention that the neighboring universe could be a whole different ballgame.
10:54It might have completely different laws of physics, making it a bizarre place for us.
11:00Following the same idea, some say that in this vast multiverse of bubble universes,
11:05there might be other lifeforms just like us.
11:07The problem is, we're getting farther away from them with each passing moment,
11:11and our paths will never cross.
11:14Other super smart researchers out there are trying to connect parallel universes with quantum mechanics.
11:20Now, quantum mechanics is basically the fancy math behind teeny tiny particles.
11:26According to it, these particles can exist in multiple states all at once.
11:31They call it a wave function that holds all the crazy options.
11:34But here's the catch.
11:36When we observe these particles, we only see one outcome.
11:40It's like the universe keeps playing hide-and-seek with us.
11:45Now, there's this theory called the many-worlds theory that says,
11:49whenever we observe one outcome, another universe pops up where a different outcome becomes real.
11:55It's like our universe acts as a giant tree, constantly branching into countless versions of itself.
12:02These alternate universes can't mingle, though,
12:05so you wouldn't even know if there are a bunch of other yous living slightly, or totally, different lives.
12:11This many-worlds theory is pretty bold, and a bit hard to prove or disprove.
12:15And that's not great for science, because scientists love to test and experiment with their ideas.
12:20But if there's infinite space out there, why wouldn't there be infinite universes, too?
12:26Try to imagine the universe as this giant cosmic playground.
12:30Some specialists believe that if it's indeed never-ending,
12:33then there's only a limited number of ways that its building blocks can arrange themselves.
12:38Eventually, they have to repeat certain patterns.
12:41If this is true, then it may be possible that somewhere out there,
12:45there might be another version of you living the exact same life,
12:49even down to what you had for brunch yesterday.
12:54Did we ever have any proof of these supposed parallel universes?
12:58Well, some say we did.
13:01Have you heard the tale of the mysterious man from Taur-Ed?
13:04It's the story of a man that ended up at a Japanese airport,
13:07saying he was from a totally unknown country called Taur-Ed.
13:11Now, some folks think it's proof of time travel,
13:14while others believe it's evidence he came from a different universe altogether.
13:19As much as you'd like to believe the story to be factual,
13:22the tricky part is this Taur-Ed place.
13:25There's a reason you haven't heard of it.
13:27There's no Taur-Ed to be found,
13:29whether in the present day or back in the 1950s when this supposed incident happened.
13:33After the airport incident, the man just vanished into thin air a day after arriving in Japan.
13:37Poof, gone forever.
13:39Let's rewind to that fateful day in July 1954 when the man from Taur-Ed supposedly landed in Tokyo.
13:46Descriptions paint him as a bearded, French-speaking man.
13:50Nothing too outlandish so far, right?
13:53Depending on who's telling the story, things start to diverge a bit.
13:57In one version, when the man hands over his passport to get stamped,
14:01the Japanese officer's eyes bulge out.
14:04While the passport looked legit,
14:05the country listed as Taur-Ed isn't recognized by anyone,
14:09including the officer and other officials.
14:12Naturally, they take our Taur-Ed visitor away for a little Q&A session.
14:17In another version, the man straight up tells the officer he's from Taur-Ed
14:21and shows him the passport when he doesn't buy it.
14:24Our man from Taur-Ed then started trying to convince the officers that his homeland is the real deal.
14:30According to him, Taur-Ed sat snugly between France and Spain and would have been around for about 1,000
14:36years.
14:37To prove his point, he even points to the area on a map that matches the Principality of Andorra.
14:43Obviously, things took a mysterious turn.
14:46The officers decided to hold the man in custody, suspecting he might be up to no good.
14:52They put him up in a nearby hotel for the night,
14:54but not without stationing two people outside his room to keep an eye on things.
14:59Can you guess what happens next?
15:00Drumroll, please.
15:02When the officers showed up the next morning, ready to continue their investigation,
15:07the man had vanished without a trace.
15:09No sign of escape, and to make matters even more puzzling,
15:12all his personal documents have magically vanished too.
15:16What if the man from Taur-Ed was a time traveler or an intergalactic adventurer?
15:22Some have even delved into the realms of science fiction to explain this bizarre event,
15:26and you won't believe the number of people on the internet who've latched onto it as evidence for alternate realities.
15:33One of the weirdest ideas suggests that the man accidentally stumbled into a parallel dimension
15:38and ended up at the Japanese airport.
15:41In that parallel universe, there's an Earth just like ours,
15:45but instead of Andorra, they call it Taur-Ed over there.
15:49Another idea floating around was that the man was a time traveler from the future.
15:54Sorry to break it to you, but the most reasonable explanation for the whole story of the man from Taur
15:59-Ed
15:59is that someone's imagination went wild.
16:02Since there are many versions of the same story,
16:05it's probable people just kept adding outrageous details to the case,
16:09to make it more sensational.
16:12The whole story simply snowballed into an urban legend,
16:15and there's little to no reason to believe we've once seen a time traveler
16:18or intergalactic hitchhiker right here on Earth.
16:22For many years, we've been discussing things like flying cars,
16:26floating furniture, and even floating buildings.
16:28But what if I told you that the idea of anti-gravity isn't just some science fiction,
16:33but is a real and fascinating concept in physics,
16:37something that physicists are actually currently researching.
16:40So what is anti-gravity, and when will we finally achieve it?
16:44Let's find out.
16:46Please, Mr. Music, give me some of that science fiction movie woo-woo music.
16:50Thanks.
16:51Imagine being able to fly to work or travel to other planets
16:55without feeling the effects of gravity.
16:57A world where you could levitate and make your household items
17:00defy the pull of gravity and float weightlessly in the air.
17:04Now, you might think,
17:05I don't have to imagine.
17:07I know that astronauts live this way in Earth orbit.
17:10Duh.
17:11But it's not exactly the same.
17:13What astronauts experience in space is called zero or microgravity.
17:18It's a real phenomenon that we can actually experience.
17:21In zero-gravity, objects are weightless and float
17:24because there's nothing pulling them down to the ground.
17:27However, anti-gravity is slightly different.
17:30It's not a lack of force, but a force in itself.
17:33A force that could counteract the force of gravity,
17:37essentially canceling it out.
17:38With this magical force,
17:40an object wouldn't be attracted to something massive like the Earth.
17:44It could actually repel it.
17:45This would allow objects to float freely in space
17:48or even move in the opposite direction of gravity.
17:51It sounds like something straight from science fiction,
17:54a way to defy the laws of physics and take us to the stars.
17:58From Star Wars to Star Trek,
18:00it's been a popular concept for many years.
18:02But could it be possible in real life?
18:05Is there actually a repulsive force
18:07that could counteract the effects of gravity?
18:10Scientists and philosophers have been discussing
18:13the idea of anti-gravity for centuries.
18:15However, it wasn't until the late 20th century
18:18that real progress was made in understanding the science behind it.
18:22And now, we're exploring the possibility
18:24of creating anti-gravity fields.
18:27So let's put on our scientific thinking caps
18:29and try to understand how it works.
18:32Let's start with the beloved and famous theory of general relativity.
18:36Picture yourself playing with a trampoline,
18:38surrounded by toys.
18:39You know that if you jump, it will cause a dip in the trampoline,
18:44and the toys near that dip will start rolling towards it due to gravity.
18:48That's what Einstein's theory of general relativity tells us
18:51about the fabric of space-time and gravity.
18:55But what if the trampoline could stretch in ways we never imagined?
18:59What if it could also curve or bend backwards,
19:02repelling both you and the toys around you?
19:05That's the idea behind modified theories of general relativity.
19:09Some scientists have proposed adding extra dimensions to space-time
19:13or introducing new forces that could interact with matter in unexpected ways.
19:18However, as with all scientific theories,
19:21we'll need to conduct some experiments and collect data to know for sure.
19:25Okay, now let's pretend the universe is a big room filled with furniture.
19:30Scientists have discovered a mysterious invisible force
19:33pushing all the furniture away from each other,
19:36like a super-powered wind that makes everything float.
19:39They've named this force dark energy.
19:42According to current cosmological models,
19:45nearly 70% of the universe is made up of dark energy.
19:49And even though it's invisible,
19:50it's thought to cause the universe to expand faster and faster.
19:54Now you can see how this is kind of like the opposite of gravity,
19:58which pulls everything together.
20:00So, if it's true, it would mean that anti-gravity is a real force.
20:05Now, wouldn't that be awesome?
20:07The only thing we need to confirm is whether dark energy really exists
20:10and has such properties.
20:12Yeah, only.
20:14Finally, let's talk about the super-string theory.
20:17Okay, so imagine you have a bunch of rubber bands,
20:20and you're stretching them.
20:21When you pluck one, it makes a sound, right?
20:24This is kind of like super-string theory.
20:26It says that everything in the universe is made of super-tiny strings
20:30that are vibrating like those rubber bands.
20:33These strings can make the different forces of nature,
20:36like gravity, happen.
20:37And get this,
20:38some scientists believe these strings exist in extra dimensions
20:42where they might be able to cause things to float away,
20:45like anti-gravity.
20:46You can see this idea in some cool movies like The Matrix and Interstellar.
20:51Overall, super-string theory may hold the key
20:54to understanding anti-gravity,
20:56but it's still a theory and needs further exploration.
21:00However, there's still much skepticism and criticism
21:03surrounding the idea of anti-gravity.
21:05Firstly, many scientists say that anti-gravity is impossible
21:09because it violates the fundamental laws of physics.
21:12For example, the law of conservation of energy.
21:15According to this law,
21:17energy cannot be created or destroyed,
21:19only transformed.
21:21But anti-gravity would require energy to be created from nothing.
21:25So if anti-gravity is confirmed one day,
21:28it will pose a great mystery.
21:31Critics also say that there is no direct evidence for anti-gravity.
21:35Although we've made some attempts to explain it
21:38using things like dark energy,
21:39they don't provide any direct proof.
21:42This has caused a huge debate among scientists,
21:45as well as those attending Star Trek conventions.
21:47So while these theories are super-fun and intriguing,
21:51they lack experimental evidence.
21:53But despite this,
21:54the idea of anti-gravity continues to capture
21:57the imagination of scientists and the public alike.
22:00Many researchers continue to work on experiments
22:03that could help us better understand this mysterious force.
22:07Whether or not anti-gravity will ever be confirmed,
22:10the journey is certainly fascinating.
22:12And if we one day confirm its existence,
22:15it'll certainly be worth it.
22:17The possibilities for technological advancements
22:20would be truly exciting.
22:21Here are a few things that could become a reality
22:24thanks to anti-gravity.
22:26First, space travel.
22:27Imagine being able to travel to the farthest reaches of the universe
22:31without the limitations of fuel or resources.
22:34This is one of the most exciting benefits
22:36of anti-gravity technology.
22:38It would allow us to explore space like never before.
22:41We could create things like anti-gravity propulsion systems
22:45or sustain fields,
22:46leading to new discoveries and opportunities for exploration.
22:50Second, energy production.
22:52We could use anti-gravity to generate energy
22:54in a new and revolutionary way.
22:57For example,
22:58if we could create a containment field
23:00that could sustain an anti-gravity state,
23:02we might be able to harness the energy of Earth's rotation.
23:06Wouldn't that be awesome?
23:08Thirdly, new materials and inventions.
23:10Thanks to anti-gravity,
23:12we could develop new materials
23:13that are lighter and stronger than anything we have today.
23:16This could have an enormous impact on many industries,
23:20from construction to transportation to aerospace.
23:23It would also allow us to use space in ways
23:25that were previously impossible.
23:27For example,
23:28we could create space elevators,
23:30similar to those in Charlie and the Chocolate Factory.
23:33Wouldn't it be cool to travel in a glass elevator
23:36instead of a plane or rocket?
23:38Heck, for me,
23:39anti-gravity would make it a lot easier
23:42for me to haul out the garbage in recycling bins
23:44every Monday before pickup.
23:46Unloading the car with groceries would be a snap.
23:49And, if you wanted to retrofit your house for earthquakes,
23:53lifting your house up to get underneath
23:55will be a whole lot easier with anti-gravity.
23:58These are just a few of the many exciting possibilities
24:01that would come with a better understanding of anti-gravity.
24:04Even though it has not yet been proven,
24:07it's always exciting to imagine what the future might hold.
24:11Overall, anti-gravity technology has the potential
24:14to change our world in profound and exciting ways.
24:18And while it may still seem like science fiction,
24:21who knows what we might discover in the years to come.
24:24And so, wait for it,
24:26that's the gravity of the situation.
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