The Biggest Questions No One Can Answer — Are We Alone in the Universe? - video Dailymotion

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Have you ever wondered about the biggest mysteries of life? 🌌 Why do we exist? How many universes are out there? And if the universe is full of planets, why haven’t we found aliens yet? 👽  In this video, we dive deep into the two greatest unsolved mysteries of science: 1️⃣ How many universes exist? 2️⃣ Why can’t we see evidence of alien life?  These questions take us to the edge of human knowledge. From the possibility of infinite parallel universes to the silence of the cosmos, you’ll explore mysteries that even the world’s smartest scientists can’t explain.  🔔 Subscribe now for more mind-blowing science stories, mysteries of space, and questions that make you think.

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00:00Where are the aliens?

00:02The biggest mystery of the universe, somewhere out there in that vast universe, there must

00:07be countless other planets teeming with life, think about it.

00:11The universe is not small, it's mind-bendingly huge.

00:16And yet, when we look around, when we tune our telescopes and listen with our antennas,

00:20the silence is deafening.

00:22No messages, no visitors, no flashing signs saying, hey humans, you're not alone.

00:29This puzzle was first put into words by physicist Enrico Fermi in 1950.

00:34He simply asked, where is everybody?

00:38And ever since, the question has haunted scientists, astronomers, and dreamers alike.

00:43It's called the Fermi paradox, and it just might be the greatest unsolved mystery in science.

00:50A universe full of worlds, in just the past few years, the Kepler Space Telescope has discovered

00:56thousands of exoplanets orbiting other stars.

01:00If we do the math, it looks like our Milky Way galaxy alone might hold half a trillion

01:05planets.

01:06Now, let's be conservative.

01:08Let's say only 1 in 10,000 of those worlds has the right conditions for life.

01:14Even then that leaves 50 million planets in our galaxy alone that could harbor living creatures.

01:20With numbers like that, life should be everywhere.

01:24Civilizations should have risen, fallen, and maybe even expanded across the stars.

01:29And yet, nothing.

01:31The timing problem.

01:32Here's where things get really strange.

01:35Our Earth formed about 9 billion years after the Big Bang.

01:39That means countless other planets had a head start.

01:43Life could have begun on those worlds millions even billions of years before Earth ever existed.

01:48Now think about technology.

01:51Look at what humanity has done in just the last 100 years.

01:55From the Wright brothers to space stations.

01:58From telegraphs to smartphones.

02:01If a civilization had even a million years of technological head start, imagine what they

02:06could achieve.

02:07They could colonize star systems.

02:10Build giant energy collecting machines called Geysen spheres.

02:14They are so large and brilliant it lights up the night sky.

02:18And yet, the skies remain empty.

02:21The dark possibilities.

02:23So why don't we see them?

02:25There are several possible answers and some are pretty chilling.

02:28The silent galaxy theory.

02:30Maybe there is a super intelligent civilization out there, but it has enforced a strict rule

02:35of silence.

02:37They're paranoid.

02:38They don't want competition.

02:40They're watching, waiting and ready to destroy anyone who makes too much noise.

02:45Creepy right?

02:46We're rare.

02:48Maybe life itself is common, but the leap to intelligence, the kind that builds telescopes

02:53and rockets, is incredibly rare.

02:56After all, on Earth, it happened only once in 4 billion years.

03:01Maybe we are the freak accident.

03:03Self-destruction.

03:05This one hurts.

03:06Maybe advanced civilizations always invent technologies they can't control like nuclear weapons.

03:12Or AR something even deadlier.

03:15Maybe every time intelligence rises, it eventually wipes itself out.

03:19A tragic pattern repeating across the stars.

03:22The hopeful answers but hey, it's not all doom and gloom.

03:26There are brighter possibilities too.

03:29We're not looking hard enough.

03:31Every now we've only scanned a tiny fraction of the stars in our galaxy for signals.

03:36It's like dipping a glass into the ocean, and then claiming there are no fish because

03:41the glass came up empty.

03:43Wrong technology.

03:44Maybe aliens don't use radio waves at all.

03:48Maybe they've moved on to far more advanced forms of communication quantum entanglement.

03:53Or even signals embedded in dark matter or dark energy.

03:57If that's the case, we wouldn't even know what to look for.

04:01Tiny aliens.

04:02Here's a wild thought.

04:05Maybe civilizations evolved towards smaller and smaller forms.

04:09Just like our clunky stereo systems shrank into tiny earbuds.

04:14Maybe intelligent life shrinks down to the microscopic level to be more efficient.

04:19The solar system could be swarming with aliens right now, and we wouldn't even notice.

04:24The search continues.

04:26The good news is, we're still searching.

04:29The SETI project, Search for Extraterrestrial Intelligence, has started releasing its data

04:34to the public.

04:36That means you could actually help scan the stars for alien signals.

04:41Millions of citizen scientists are joining the hunt.

04:44And soon, new telescopes will be powerful enough to scan the atmospheres of nearby exoplanets.

04:51Within the next decade or two, we may be able to tell if those planets have oxygen, water

04:56vapor, or other signatures of life.

04:59Imagine pointing a telescope at a distant star and knowing really knowing that someone else

05:04lives there.

05:06Meanwhile, here on Earth, scientists are trying to create new forms of life from scratch in

05:11labs.

05:13Not just DNAB's life, but entirely new biologies.

05:17That could help us understand how likely or unlikely life might be across the cosmos.

05:23What if we're alone?

05:24And here's the thing, either answer is oi-inspiring.

05:28If we do find aliens, it will change everything we know about our place in the universe.

05:34But if we don't, if we truly are alone then think about what that means.

05:39It means every thought, every dream, every song, every idea that exists, it all exists

05:45only here.

05:46On this one fragile world, and that makes us unbelievably precious.

05:51The real treasure, the truth is, the search itself is the treasure.

05:56The quest for knowledge never gets old.

05:59In fact, it's the opposite the more we learn, the more mysterious and beautiful the universe

06:04becomes.

06:06The unanswered questions are what pull us forward.

06:09So maybe the aliens are out there, maybe they're not.

06:13Either way, one fact is undeniable, we are the universe becoming conscious of itself.

06:19That's a miracle in its own right.

06:22So the next time you look up at the night sky, remember, the silence is not empty, it's full

06:27of questions.

06:29When those questions are waiting for us, stay curious.

The Biggest Questions No One Can Answer — Are We Alone in the Universe?

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