If there are other lives in the universe, I hope they are not as stupid as us.

It’s funny ya know… as a kid from Toronto.. the hometown of RUSH… the band has been overlooked for yrs by publications and many like your old boss .. but the Humble Progressive Power Trio has filled arenas for decades and been immortalized by the music intelligentsia … the immense amount of talent these gents have and the astonishing amount of music they left us over 1/2 a century solidifies their place in music history as one of those artists that changed music… and we are very proud as Canadians we have this masterpiece called RUSH to share with the world…

Even this severals old the information is mind blowing wwooww thank you for sharing this video

Jeez! Wanted to watch this to relax to but wow. So "busy", such hectic. No thank you! Rarely bailed out of a video so quickly

Object, gravity and zero Gravity are about everything in space

A Cepheid variable is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude.

this documentary is several years old.

of coarse we are alone... we will never see or hear from other life and if we do we can never get there

"Are we alone in the universe? Not a chance." . Yess, absolutely agree!

I LOVE PBS AND NOVA AND HAVE ALL OF MY ADULT LIFE. SERIOUS ISSUES ADDRESSED WITH AN SIMPLICITY WE ALL CAN UNDERSTAND!!!

PBS America the best documentary app. Excellent videos, very educational and informative! 😍🤩🥰🌍✨🥇🏆🙏👍👏📱 3006 Philippines 🇵🇭

... 0:40 WOW. 0:53 THIS IS A GOOD ONE.

I so much love the anology of the father and his two kids

We might not have been able to spot life on planets far away because they're so distant that what we see is like looking back in time. It's similar to how the idea/theory of alien civilizations haven't found us yet because from their viewpoint, Earth might just look like a gaseous ball of fire, because of the time it takes for light to travel from here to them.

Love USA , Are we alone in this Mysterious Universe is all time grate question .

Why did you not Explain the " Dyson Sphere" Theory??

Very busy. Old info Kepler is already retired Anton petrov = cutting edge and relaxing.

It seems like we are not alone..but as Carl Sagan said, "SOMEONE has to be first."

Really interesting video. Enjoyed watching this. Thanks.

This video is deceiving, published 2 weeks ago at me the time of writing and saying that the JWST still has not been launched? how old is this video? still nice info

I hope that when human-kind finally undergoes extinction it will make way for an intelligent life to emerge on Earth.

Definitely we are not alone there is a planet out there that can support life humans keep on searching before this planet earth wears out 👽

10:13 3000 planetas descubiertos 11:00 10 billones de planetas en nuestra galaxia 45:31 weird star

Tabby's star, to explain that, dimming so much, i would think my guess is there is a Black Star orbiting it, not a black hole. too my best guess, i don't think there are black stars in theory, but it could be.

what about the WOW signal?? its incomplete

We gotta pull apart mars and put shiny paint on it and put the bits in orbit. We have a Dyson gap with the Klingons.

Anyone know the identity of the individual at 0:36? In the video, he says "buiding an artificial intelligence is a crowning achievement of humanity"

we are not alone. we just can't find each other due to the vastness of space. what if they use other mode of communication rather than radio signals? or some planets still have primitive life.

What's the difference then, between PBS America and PBS Space/Time ?

Submersible into Europa gives an insight over life.

Surprising they didn't talk about the Drank equation.

If there happens to be creatures on Europa, do we call them Europeans? Or Europans?

How the hell where we came from??? The same way Christopher Columbus came on our side of the continent.

Salut!! imagine a ponds of one structure around our Sun,,the mass of that construction will be very high.The orbit of every planète will be lost and she's going everywhere

I AM SURULY SURPRISED THAT I WAS THE FIRT VIEWER TO CLICK "I LIKE" TO SUCH AN IMPORTANT AND WELL MADE PBS DOCUMENTARY. WHAT'S WGOIJG ON WITH THE YOUNG FOLKS OVER HERE/THERE ? ARE WE SUCH A DISASTER ?

As an alien from Proxima Centauri b, I can confirm - Earthlings are NOT alone. We exists!

If we knew that we are not alone, we would not ask all the time. Nobody knows. I correct myself, God knows but he is hard to get hold off.

Why are the planets in the trappist system not named Westvleteren, Orval, Chimay...

Has the James Webb been able to solve the Tabby's Star mystery?

The chance of other intelligent life in the universe concurrently existing--not having blown itself up--is expressed by the Drake equation, which he cobbled up with Karl Sagan. It involves a product of (multiplied-together) factors, most of which are probabilities. A characteristic of such equations is that if one factor goes to zero, the whole equation goes to zero. Is such a risk in the Drake equation? Yes. The 4th factor (variable) is the chance of general life being available at a location. This requires not only existing life further developing but also life coming from non-life. Called abiogenesis. No one has yet come with a plausible pathway for abiogenesis, from a non-biotic world. See James Tour. The odds against are horrific. In terms of one chance in X number, purely mechanical abiogenesis has an X that is far, far, far bigger than all the subatomic particles in the universe, even if we include possible dark matter in that number. In other words, the value of the Drake Equation's 4th variable is effectively zero. Making the Drake Equation itself's number be zero, even before considering the additional challenging factor of sentience. Even if the star is stable, without solar flares. Even if a planet of appropriate size exists in a stable Goldilocks-zone orbit. Even if the planet is far enough away from the star to reduce tidal forces to where volcanic activity is minimal. Even if all other factors are ideal. Still zero. No matter how many stars and planets exist. Sorry. A vast, wonderfully fascinating universe is out there. But an intellectually honest inspection of the situation--without the conceptual ducking out that I have previously seen in researchers--leads to zero optimism. UNLESS something other than a purely mechanical abiogenesis has happened. But that possibility is very controversial. Toward ultimate answers, beyond the regress of panspermia, one has to contemplate nature-external intrusive help. Help from some kind of creator deity. The only optimistic yet still intellectually honest SETI research has to contemplate a theistically produced abiogenesis. This requirement freaks out most scientists. For obvious reasons. But, let's explore...

TRY TO ANDERSTEN YOUR SELF,AND YOU WILL FEEL THE UNIVERS.

Salut !! i'm practically shure ,we can find microlife underground or Mars !!,,,,,and water... .. .

Aliens are prehistoric on earth I notice a star move out it place

Imagine each of 360 degrees out radially from the center of our Galaxy...how many Advanced (say local solar system travel or better) Civilizations exist on each 1 degree wide pie slices that are roughly 50000 light years long ...pessimistically 1...maybe 10...more likely 100, maybe even 1000 (maybe every 50 light YEARS apart). Yet we are very far apart even at 4.2 or 4.3 light years as we are from Proxima and Alpha Centauri. If we could make a Spaceship that could travel at 186 Miles per second or 300 km per second...1/1000 the speed of light and several times faster than any big rocket we have deployed so far, it'd still take 4200-4300 years ONE WAY to get to our closest STELLAR Neighbors. So at least 100 generations of Travel in 1 direction! So they can be THERE yet we'll probably never get to them! Nor would they come to us unless they could travel at close to the speed of light. Sobering and yet a good design by God!

If we are searching for life that is like our own we better hope we don't find it. You know vanity is not very kind the things it does not understand or to things that seem hostile. The wasp maybe my friend but not when it bites. Mankind has insecticide sprays which do away with Wasps and that's before we even talk to them. Man knd did not survive from its most desperate beginnings by being kind to everything. So if we find life somewhere that is like our own, well you had better be very careful.

There is definitely intelligent life in this universe, but it is so far away We can not possibly teavel to each other. So We did create Artificial Intelligence, because We are dumb and lonley.

We may not be considered to be intelligent compared to our interstellar friends

"In 2020 NASA plans to..." wait, what, how old is this episode?

...and we know these folks are out of this world because at 1:03 they've found a planet where the DNA has a counter-clockwise screw-thread.

Amount of ads in this video is crazy

What if this dimming is some kind of code or message like Morse code

These documentaries used to be good, why did they have to dumb them down.

"Are we really alone in the universe?" The soil farts and the show ends.

Why? It’s probably better to leave things alone.

what a long winded waste of time

Same old stuff its good but need new material tell us something new.

In fact there is no need more music at all . !!!!!

I think the excitement and energy levels are just… way too high for me here… ✋😕

Absolutely

WE SHOULD GET "AI" TO FIGURE WAYS TO MAKE ENERGY OUT OF HEAT AS WELL AS LIGHT, OF FRIGID TEMPERATURES WHERE MINUS 30 CAN POWER A HEATER IN A TENT, THINGS LIKE THESE???!!!

If there are other intelligences in the universe? What do they have to look for in a planet where human animals live, where wars, destruction, hatred and poverty are still raging.

It used to be that people mocked and ridiculed the crazies. Now they celebrate them and want to believe what they believe. :(

We are alone ....dead planets everywhere our there ..

More science light; which is to say mostly just bad science fiction. This used to be a great channel and many of the explanations and expositions aired here about some extremely difficult and mathematically demanding topics have been exceptionally good, particularly if like me you have at least some familiarity with those problems. The worst of these problems however is that there's really been almost no significant progress whatsoever in our understanding of any of the 5 foundational problems of physics for at least 30 years. 1. The problem of quantum gravity: Combine general relativity and quantum theory into a single theory that can claim to be the complete theory of nature. 2. The foundational problems of quantum mechanics: Resolve the problems in the foundations of quantum mechanics, either by making sense of the theory as it stands or by inventing a new theory that does make sense. 3. The unification of particles and forces: Determine whether or not the various particles and forces can be unified in a theory that explains them all as manifestations of a single, fundamental entity. 4. The tuning problem: Explain how the values of the free constants in the standard model of particle physics are chosen in nature. 5. The problem of cosmological mysteries: Explain dark matter and dark energy. Or, if they don't exist, determine how and why gravity is modified on large scales. More generally, explain why the constants of the standard model of cosmology, including the dark energy, have the values they do. As for life, (and presumably sometimes intelligence,) existing elsewhere in the universe statistically it seems highly probable, but have be ever received the slightest indication that it actually exists such as some kind of intelligible signal, the answer is no.

by the way, were not the most advanced life on earth far from it, we share it with more advanced life forms, they are so advanced we can barely reconize them as life.

HI,.. I'M maho maho Son 👽

❤🧠👣🦉🔭👣❤

They are already visiting us... duh. Listen to UAP experiencers and look at the data, I'm just sayin'...

The money we allow to be spent on this pointless field is shocking

“if life was discovered on another planet, it would be the biggest discovery of our lifetimes” So i’m only 55 and she is definitely younger than i am. if life on another planet would be the biggest discovery of the past 55 years, than what is the biggest discovery of the past 69 years???

It's a balloon.

You know why they are not being found because we make things so complicated all this technology and money being wasted for something that doesn't want to be found use those funds for something good.. With all those intelligent people focusing their energy on something so pointless..

We are alone for now because we are like an ant in a football field. The universe is so far that it's unlimited to us with our present technology. The universe is estimated to be 13.7 billions years old, toward us is old but compared to the universe, millions and billions years is normal. So we see the universe as very old but to universe, it's young therefore, we might be the first intelligent species that is why we are alone. We better hope that we are alone because what our scientists did sending out to space the blue print of our biology and earth's location can be danger for humanity if the information fall into the hand of a violent alien, it will be the end of humanity. We can see it in our own human history how the strong conquered the weak. It is the most carelessness thing our scientists did. (When you are over confidence, you become a "smartass")

There are dinosaurs on other planets but no humans

SETI is a search for funding and job security ,the government knows it keeps searchers happy and while there looking there they are not looking here !

notice how much time they spend talking about planets where humans CANNOT live. 4.5 light years from earth there is a planet that lays perfectly in the zone, but you don't hear about that here!

this must be the kids version of nova..

This documentary is too old!

Alien megastructure? That's about as dumb as I could imagine.

The entire scientist are in comments section including some Aliens

Same old thing...the universe is too big, too many planets and stars for the earth to be unique...and by unique I don't mean special, for god's sake!

Do the numbers.........nobody there.

Is this documentary targeting people with very low IQ? The narrative, imbecilc music treats its audience like we are 5 yrs old. I am writing from the UK and interested to know if it's done intentionally to capture a wider US audience. Very sad state of affairs if so.

This cry of our loneliness in the universe almost feels really pathetic until you realize that no one really takes that to heart. But there is an even more pathetic situation. Here we are calling out to the universe looking to get a heartwarming response, but there is great king in the heavens calling out to man saying, "Come to me all ye that labor and heavy laden and I will give you rest" Matt 11:28. Many especially among the scientific community do ignore this call to a relationship with God and His myriads of holy angels through the atoning blood of Jesus. Little do men realize that it is the goodness of God that is preventing dangerous fallen angels from responding to SETI calls. MAN REJECTING CALLS FROM GOD AND HIS HOLY FAMILY OF ANGELS AND SAINTS AND REACHING OUT TO A DANGEROUS UNKNOWN? ITS ABSURD! God is also lamenting that men are not answering His calls. Hear Him in Proverbs chapter 1:24-33

Jupiter'jesus God Son 🌹 alien 👽

It's impossible that we are alone,I cannot understand how any scientist could even think that ludicrous,basic common sense is all it takes,alone in the entire universe,absolutely 100% impossible,it really is that simple,how can it be possible that earth alone is home to life,that would be more terrifying and more astonishing than any event or thought ever conceived in human history.

Didn't like the video production.

The quality of NOVA shows has dropped significantly.

Sorry guys! ❤I love you! But this is not very Convincing🤷

ans what someone is doing is putting new people i9n place og the old video to make you think this is new its kinda bad

So Good! Bit unfair to have two of the most attractive females possibly alive today on this little planet, in one show. I do mean attractive physically, intellectually and I suspect spiritually.

I dobt the technology

Jesus is The Way, the Truth and The life. Seek Him and you will know the Truth about the Universe.

fox isnt news and this is real old n we know what it was ugh

Is this aimed at 10-year olds?

I find it rather amuzing that North Americans are quite unable to pronounce the words, " mirror / s." This is no insult. A native speaker of Spanish is unable to correcty pronounce my first name, `Steve.` I`m sure there must also be some English words us English are, in general, unable to pronounce. But not many - that would be silly thinking ! No other nation on earth has contributed more to the exploration of near space than the United States of America.

Woke science.

This music, crazy transitions and even the fast talking scientists. 👎Why does everything have to be this "Hollywoody"? What happened to the good old documentary, man? I can't watch these.

😂 it's just a chemical reaction, to think just the sun can give off light is very unscientific 😂hahaha an alien megastructure!!! Guy is on too much lsd

Too much silly overbearing music ….. just talk is enough …