Where are all the aliens? | Stephen Webb

  • Published: 16 August 2018
  • The universe is incredibly old, astoundingly vast and populated by trillions of planets -- so where are all the aliens? Astronomer Stephen Webb has an explanation: we're alone in the universe. In a mind-expanding talk, he spells out the remarkable barriers a planet would need to clear in order to host an extraterrestrial civilization -- and makes a case for the beauty of our potential cosmic loneliness. "The silence of the universe is shouting, 'We're the creatures who got lucky,'" Webb says.

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  • Science and Technology Science and Technology

Comments • 9 913

  • Merlin Darkwing
    Merlin Darkwing  21 hours back

    Why is it so called experts push the nonsense that this spec of a planet is the only place in the infinity of space with life. And yet the People of this planet have been recording, in stone, and other mediums their contact and interactions with beings from the stars, and all around the world people see these aliens, the answer for you is the government intentionally keeps the secret by claiming all sightings are either mass hallucination or swamp gas. And that is their same explanation for all of history everyone just made it all up. We listen for radio signals, something we didn't know about until just over 100 yeas ago, advanced beings are using technologies far beyond what we can imagine right now. They have masters degrees and we are still in day one of preschool. And that includes you. We are still ni the fire stage of energy, we burn things, warp speed doesn't use fire. So open your tiny mind to a more acceptable truth of our still primitive level and inflated ego that everything must be measured by what we can accept happens on this planet. We are NOT that special.

    • Andreas Andreotti
      Andreas Andreotti  1 days back

      Early morning reflections by Orion while eating breakfast and enjoying a cup of coffee.

      Let's play with thoughts for a while, shall we?

      There are endless debates about how everything was created,
      both religious and scientific. Lets forget about the religious. They are so stupid and ridiculous. Let us have some reflections on the scientific ones.
      The universe, the earth, life on earth, if there are lives on other planets, when the dinosaurs and other animal species arose and when they disappeared, how it all began and when it will end! We read many thick books to find answers to all kinds of existential questions. We start asking the questions in a proper way such as What? When? Where ?, How? Why? and instead of a definitive answer, new questions pop up that lead to more questions but no definitive answer!
      Generations earlier than ours, asked the same questions. The future generations will ask the same questions. And what if future generations they find the answer? Neither we nor our ancestors should be present to pay tribute to them!
      In other words, we continue to play with the idea and state that we, I mean literally WE, were not present from the beginning of the universe until our existence on earth. To be exact, we're talking about 13,772 billion years, that is 13,772 × 1,000,000,000 years of absence. According to the bettors, the Big Bang took place for such a long time ago. In comparison with the giant number above, our existence on planet earth is like a drop in the ocean. Big Bang means expansion thus the universe is still expanding but this will not be perpetuated. Enormous forces of Gravity will intervene and the universe will begin to shrink again.
      Here we have three terms to choose from: The Big Freeze, The Big Rip or The Big Crunch.
      In other words, back to box one, back to the start again! Maybe for a new Big Bang explosion. If this is to take as long as it needed to expand, ie 13,772 × 1,000,000,000 years and more, then we are not present again during this endless time to be able to follow this spectacular development.
      So, back to: Let's play with the idea.
      What happened during the Big Bang expansion and what will happen during the process the universe should reach the final stage of collapse? Try to compare it with our insignificant existence. Is there something to worry about?
      Things happened for billions of years while we were absent and things are going to happen for billions of years while we are gone forever.
      Why do we need to be tormented and anxious when everything is going to turn into dust and maybe start from scratch again!
      And then, who knows we maybe thrown in for a little while in this huge new process to catch a glimpse of the big event!

      • Trevor Sutton
        Trevor Sutton  2 days back

        Teleporting, invisibility, rearranging atoms making anything they like or need instantaneously, beings like this when would you spot them.only if they want

        • the imaginator
          the imaginator  2 days back

          well ok , after watching that video im convinced that dude really is wearing a human skin and really is an alien,not to scare you but, yep im certain.

          • the imaginator
            the imaginator  2 days back


            • G Philip C
              G Philip C  2 days back

              Alien to Alien Bud, 3000 years ago: Perhaps we could hybridize them with rocks. Hence the phrase..."dumb as a box of rocks".

            • Peter Roy
              Peter Roy  3 days back

              you can make fun if you want to,but I know what I saw is real, keep an open mind..worm holes exist, and are used by beings more advanced than ourselves...

              • jupiter
                jupiter  3 days back

                We dont even know how us humans became the intelligent beings we are today, every theory about it is just theory. What if, just what if, the old gods or/and the god of the bible are those aliens who came to earh to plant the seeds of what we are now?

                John 14:2-3 "My Father’s house has many rooms" Jesus was the true herald of the truth and the way for salvation. Salvation from what? from our own stupidity and self destructive nature. Again, just a "what if".

                • Lincoln Colt
                  Lincoln Colt  4 days back

                  The arrogance of humans. I simply cannot imagine listening to this person drone on and on about what he thinks he knows

                  • Moosha เล่าเรื่อง

                    Only earth can support life. And those aliens are us from the future! 👽🧐

                    • K Marx
                      K Marx  4 days back

                      Let me define what humans mean by "aliens": Beings living outside Earth, in the vicinity of Solar system (dozens of light years at most), with an intelligence/civilization similar or slightly superior to ours.

                      Well, that's highly improbable.
                      Beings way above our civilization we would not be able to perceive. Beings at hundreds of thousands of light years from us or disappeared because of some catastrophic event, we would not be able to observe. Beings way below our civilization, we are not interested in them, we consider them animals.

                      • Timothy Simpson
                        Timothy Simpson  5 days back

                        Why does he think they come from this dimension or this frame of time ??

                        • benny pitt
                          benny pitt  3 days back

                          B/c otherwise would be useless and impossible to prove and communicate with. The other dimension route is something we could never prove not to mention peoples comprehension of it. But say by some miracle we were able to provide some evidence of it, can you imagine how terrifying that would be for people and the paranoia that would consume this planet? Imagine a world full of schizophrenics with evidence proving there aren't really crazy. That monster under your bed could be real, and you're not able to see it, that's not the atmosphere you want to live in.

                      • #meneither also
                        #meneither also  5 days back

                        Human life has a realtime impact on the external quantum state from the point of earth within the omniverse

                        • Rick the Swift
                          Rick the Swift  4 hours back

                          Could've explained it better myself 😂😂😂😂

                      • BOYKA
                        BOYKA  5 days back

                        This is what I say when I'm drunk.. ,, feels alieNs 😁👻

                        • Jesus Christ
                          Jesus Christ  5 days back

                          I remember watching a video once that talked about an interesting idea. The reason we are alone in the universe is because WE are the aliens, we are the space-faring empire that has expanded across the stars. We are the greys that abduct people (or whatever sentient creature we are abducting) Perhaps we can find know other civilizations because we got here early, far before any other civilizations home world even becomes habitual. So hence we are the galactic civilization that will shape the universe and be the creators of majestic mega structures that pre galactic civilizations look on at in wonder and fear alike.

                          • Rick the Swift
                            Rick the Swift  4 hours back

                            I agree JC! Watch out martians- unless you wanna get abducted and probed 😂😂😂😂

                        • John Osborne
                          John Osborne  5 days back

                          Over 3 mill. reported sites on average each year, this guy can't seem to locate one. I can take anyone willing to go and for sure you'll see a U.F.O. no one cares I've been telling people for years about this the only people that contact me are the ones that say. Yup I seen them too. O well any one know this fellas number? Ha ha

                          • Stephen Duranleau
                            Stephen Duranleau  5 days back

                            Some beings live in different light spectrum's .

                            • Ganesan Kuppusamy
                              Ganesan Kuppusamy  6 days back

                              Earthians View: According to study by Earthians ‘When solar system was born 4-6 billion years ago only 6 percentage of potentially inhabitable planets that will ever form in the universe existed, which means 92 percent of more earth like world yet to be born.” Earthians accepted that Earth planet is not flat but just like a ball rotating, that there is a vast dark force, Earthians studied about the shining stars and heavenly bodies and also named some planets and stars. Earthians creating horoscope and calculating the fate of human being based on the planetary movements and stars. Earthian accepts that there are seven human beings with similar face structure. Earthians cannot deny that they appeared on the Earth without parental sexual functions. There is Universal power that no one can see or feel the power or predict the time limit function of the Almighty.
                              • There are about 300 Active planets in seven universes. Just like Earth Planet there are one planet in Haloma Universe, one planet in Rajsival Universe and one planet in Hindoma Universe. All the three planets are identical to the Earth Planet, and Bindra (mold) is just like Earthians, but mass of the three planets may vary.
                              List of Active Planets shown in bold letters, from which Human like beings transported to Earthial Active Planet




                              Sikar, Huma, Bayal, Omnia, Daman


                              Sivana, Neren, Vikram, Dhunmuk, Dharal


                              Gala, Negal, Vasist, Kalima, Nilaj, Jolrim, Arabus


                              Anjela, Omiral, Bavinja, Kanosil, Mythasi, Vigala


                              Allah, Vanama, Erica, Crist, Emag, Epep, Necara


                              Dinag, Raesh, Milta, Yungh, Egsal


                              Seah, Akens, Hivin, Chada, Feso, Hogen, Biocol

                              The names of Active Planets and Universe. Earthians Year, month and date on which subsequent batches landed on Earthial.


                              Earthians year

                              Name of the Planets


                              10TH Hamnial (Sep) 006,223 (Aroling=Friday)

                              Omnia, Sikar


                              05th Visnial (Nov) 006,322 (Ertling=Sunday)

                              Sivana, Dharal


                              08th Japnial (Feb) 006,407 (Hamling=Tuesday)

                              Kalima, Arabus


                              09th Lomnial (Aug) 006,531 (Loming=Monsday)

                              Erica, Necara


                              15th Sivnial (Oct) 006,501 (Lomling=Monday)

                              Bavinja, Vigala


                              28th Polnial (May) 006,612 (Hamling=Tuesday)

                              jinag, Egsal


                              20th Nepnial (March) 006,715 (Ertling=Sunday)

                              Akens, Biocol


                              • Noe DragonTamer
                                Noe DragonTamer  1 days back

                                I gave you a like because I felt so bad that you had to type that all out

                            • tuxedobob2
                              tuxedobob2  7 days back

                              The universe sounds old, but it's still relatively young. Maybe life is just rare and we're one of the first.

                              • Jesus Christ
                                Jesus Christ  5 days back

                                I remember watching a video once that talked about an interesting idea. The reason we are alone in the universe is because WE are the aliens, we are the space-faring empire that has expanded across the stars. We are the greys that abduct people (or whatever sentient creature we are abducting) Perhaps we can find know other civilizations because we got here early, far before any other civilizations home world even becomes habitual. So hence we are the galactic civilization that will shape the universe and be the creators of majestic mega structures that pre galactic civilizations look on at in wonder and fear alike.

                            • INSANE DISAPPEARANCES!!!!

                              In a non physical plain or another dimension, where they phase in and out of our plain through mental cloaking.

                              • John Atwell
                                John Atwell  1 weeks back

                                This guy is dull. Einstein said Imagination is more important than knowledge.

                                • Arsalan Hashemzade Sarraf

                                  Now adays telling lies look a lot
                                  like documentaries...!

                                  • Hoi Blij
                                    Hoi Blij  1 weeks back

                                    Area 51

                                    • hugo fernandez
                                      hugo fernandez  1 weeks back

                                      I don't agree, only cuz' everything points to everything be cyclical with even the big bang not being a sole event. He is addressing the fermi paradox but according to infinite monkey theorem, we're not that special. If you turn back the clock earlier, it is actually more likely we are not an anomaly. The barriers he speaks of are barriers to communication not existence.

                                      • Tomasz Prochno
                                        Tomasz Prochno  2 weeks back


                                        • PsyKey
                                          PsyKey  2 weeks back

                                          There is also the time dimension. Maybe they aren't intelligent yet, or are already extinct. In 4 Dimensions, it's an even harder question.

                                          • FiLpLokko
                                            FiLpLokko  1 weeks back

                                            this actually makes sense, maybe there are not intelligent aliens because they were extinct, remember what he said in the video? that maybe there are other barriers coming, like bioterror, global warming etc, what if those aliens havent survived enough to be able to communicate with others or colonize other planets? they didnt survived the test of time

                                        • Zeke Banister
                                          Zeke Banister  2 weeks back

                                          All we know is that as of this date and time no one has ever proven that we have had alien visitation.

                                          • Rick the Swift
                                            Rick the Swift  4 hours back

                                            Actually I hired several last month to put on my roof 😂😂😂😂😂😂😂😂😂😂😂😂

                                          • TermsofService
                                            TermsofService  1 weeks back

                                            Zeke Banister speaks truth to the power of the YouTube credulous masses.

                                        • Sanperplay®
                                          Sanperplay®  2 weeks back

                                          Question is: where we are?

                                          • Richard Biffaman
                                            Richard Biffaman  2 weeks back

                                            We know there are visitors from somewhere else in our Universe! not just me but nearly 50% of the town I live saw these 7 lights just stuck there while the sun was setting and they stopped maybe 5 or so minutes and all together moved of slowly into the Northwest, And the many multiples sights from around the world not to forget the images seen by aeroplane staff an and passengers, There are too many people that have proof of visitors, Sorry to burst your Bubble

                                            • Edward Rauche
                                              Edward Rauche  2 weeks back

                                              A guy giving a talk about aliens who doesn't know anything about aliens. When we know but a little we imagine we know a lot. When we know a lot we know we know but a little.

                                              • Love Sunshine
                                                Love Sunshine  2 weeks back

                                                They are already among us and they were here before us too..

                                                • Butter Johnson
                                                  Butter Johnson  2 weeks back

                                                  Where are the aliens? I prefer to ask when they are rather than where.

                                                  • Rick the Swift
                                                    Rick the Swift  4 hours back

                                                    Whenever there's burritos on the grill 😂😂😂😂

                                                • Grace K
                                                  Grace K  2 weeks back

                                                  Maybe..human beings was just a successful experiment..maybe there's a lot of other experiments in other world's so far away...and maybe they are also tryna reach to us...or maybe not...this aliens is just so intelligent and we can never be sure about nothing...that's what it is

                                                  • bOR6ASM
                                                    bOR6ASM  2 weeks back

                                                    I think of it as, with human science, we depict our universe is 13.8 billion years old. Impossible to know if this is accurate or not as its "human science". Also, with our human science, more or less, we won't develop or live long enough to find other species in this universe. It's possible to say there are more advanced species out there, however even they can not reach us or live long enough to do so either.

                                                    • Jean Etchepare
                                                      Jean Etchepare  2 weeks back

                                                      There here already in large numbers camouflaged as lawyers and dentists, their fees give them away, they are out of this world!!!

                                                      • asian tourist
                                                        asian tourist  2 weeks back

                                                        *everyone after coming back from the disappointing storm 51 raid*

                                                        • malc Moore
                                                          malc Moore  2 weeks back

                                                          For all I know we are inside of a fish egg inside of a fish gut on a dinner plate.. that's being fed to a cat that lives on the fur of a dogs flea.that lives in the teardrop of a worm that's on the end of a hook that's in a lake of water inside of an ells mouth that's inside of a pike that's in the net of a god that's on leave from work having a day's fishing.thats all happening inside the mind of a 2 month Old babys dream.

                                                          • asifbih
                                                            asifbih  2 weeks back

                                                            life could not exist around anywhere near our solar system and it still could never be considered “rare” because do we really know just how big the entire cosmos is? Of course not we never will

                                                            • Taz-on-the-loose Yusef
                                                              Taz-on-the-loose Yusef  3 weeks back

                                                              I wish I could see this man face to face and tell him what our whole family experienced wayback in the late 70s here in Botswana, and later in the mid 1980s, before the internet era and even the word alien, extra terrestrials or ufos, to cut the story short we came across these humanoids, they do exist somewhere and the ones we met were helpful really helpful

                                                              • Grace K
                                                                Grace K  2 weeks back

                                                                Wow..that's an epic one...I hope I meet them at least before I die...but truth is this guys don't wanna be seen and they is waaaay more intelligent than us..so I guess there's no way we'll ever know who this guys are

                                                              • Taz-on-the-loose Yusef
                                                                Taz-on-the-loose Yusef  2 weeks back

                                                                @Grace K we lived far off in our farm, where we grew crops, our small farm was on an overgrown place with african acacia and other deadly thorns, stray cattle came to our farm at the middle of the night so my father woke us to chase the stray cattle far off over the hills, it was pitch dark the brightest light came from above, so bright and we could see even the distant hills it was just like daylight, we didnt even think of the light until we have driven the cattle faraway, it was only when we reached our farm again that the light dissapeared, thats when we realised it was still night, we were not afraid, our father said they were angels, but listening and watching youtube stories i can simply say that were aliens

                                                              • Grace K
                                                                Grace K  2 weeks back

                                                                Helpful how?

                                                            • Ares Silverfox
                                                              Ares Silverfox  3 weeks back

                                                              The aliens are to busy simulating us in their lvl 3 civilization. ^^

                                                              • ADAMS MITH KENNEDY
                                                                ADAMS MITH KENNEDY  3 weeks back

                                                                EXACTLY! Even though we fail to recognize it, we are already a type 2 civilization .. look at the star systems on your money. Type 1: Harness the suns energy Type 2: Harness star system energy Type 3: Galactic harness.. Well, Anyway. Take a peek at the ten dollar star system .. it is the security and energy backing some of it .. Also .. one of the reasons we have been in so many "galactic wars" as is apparent by radiation, scars on the moon and the asteroid belt that used to be our "eight" day of the week/weak :)

                                                            • assault and battery
                                                              assault and battery  3 weeks back

                                                              Who told you that the universe is 13.8 billion years old? Who told them? And who designated the panel of 'experts ', as experts and what criteria did they use to do so?

                                                              • Junior Shah
                                                                Junior Shah  3 weeks back

                                                                As a science student, i don't know why sometime i think we will never ever find life forms other than earth even in the future with all the technology we have and will have.

                                                                • Ratih Ningrum
                                                                  Ratih Ningrum  3 weeks back

                                                                  There is NO alien/ET.

                                                                  • jg 333
                                                                    jg 333  3 weeks back

                                                                    This is a terrifying notion and one to definitely ponder.

                                                                    • Pearl OfQatar
                                                                      Pearl OfQatar  3 weeks back

                                                                      Thinking most people forget 2 large things in our distant past....
                                                                      DINOSAURS and a mother of a METEOR..apparently no humans before this event.
                                                                      Thinking we are ALONE...

                                                                      • Ad Max
                                                                        Ad Max  3 weeks back

                                                                        He said Math instead of Maths....he's wearing his human suit.

                                                                      • Druidyx 2.0
                                                                        Druidyx 2.0  3 weeks back

                                                                        so funny see these folks trying so hard to convince everybody to believe the contrary of the logical point
                                                                        alone maybe feels anybody who pretends to have the truth in something as big as our universe, and talking fancy words doesnt make him more right xD
                                                                        great level in general the TED Talks, this one is the exception of the rule, enjoy pals !!

                                                                        PD: to protect and value our planet and existence it is not necessary to discard and reject everything else in the universe, and this pal shows an intense inhuman cold in his eyes, go irony ^^

                                                                        • worldofazeroth
                                                                          worldofazeroth  3 weeks back

                                                                          Here's a couple of things to factor in. The universe is so big, we or any civ out there is too far for their signs of existence to reach earth. 2, time. Thousands of civs could have rise and fallen in a span of a billion years and we just are too far to notice the signs. 3. There are civs out there but we haven't been looking long enough and we don't have the tools to actually detect them. 4. Civs are out there and know of us, but are capable of avoiding detection. 5. Other civs are out there just like us but are so far away they can't find us just like we can't find them. 7. There are other forms of life out there and the evidence is in front of us but we don't have the science, the tools or the intelligence to notice. Or maybe we are alone, we just don't know.