A brilliant scientist with the soul of a poet. We were blessed by his presence and lessened by his passing.

@Aguamarina38

Жыл бұрын

Absolutely agree.. He had a different look to Physics that Einstein had. Both great scientist.

@karlshipley5142

Жыл бұрын

Einstein X William Blake.

@niiloleinonen

Жыл бұрын

very well said

@bcm70

Жыл бұрын

That's the best description of him that I've ever read. No scientist who presents documentaries alive today can match him.

@MegaSpazzie

Жыл бұрын

10 billion life forms on Earth and only ONE even knows they are on a Sphere. 400 billion stars in the Milky Way. So maybe I estimate just 40 intelligent life forms in the Milky Way over the last 13 billion years. The universe is "designed" to support life, no matter how hostile the environment.

GOOSEBUMPS WHENEVER I HEAR SAGAN SPEAK

@edstar83

5 жыл бұрын

Ah... Mr Anderson...

I got to see saturn the other day on my friends telescope. I could see all the rings, even a few of its moons. It was magnified so well, it looked just like the pictures I've seen from nasa. I always knew the other planets are there, but when you see it for yourself like that it blows your mind. Seriously changed my outlook on things by witnessing that lol. Everyone should have a chance to look through a nice telescope sometime, and see the amazing things in our solar system.

@hopereyes1219

Жыл бұрын

I myself by watching NASA's picture of the planets gets awed by how they look and suddenly feels of being there by closing yours eyes. I get goosebumps.. 😍😍😍

@Kinobambino

Жыл бұрын

Can I come over and see ir through your friends telescope

Carl Sagan deserves a post-morten Nobel prize. Why ? He educated people in science as noone else.And he did it poetically, hence reaching feelings of of his audience.

Amazing how all Sagan's personal research ended with his death nearly 30 years ago, yet he still sounds more informed and in tune with his subject than most teachers, professors and KZread geniuses. A true futurist..♥️

Sagan was one of the greatest astroscience explainers of all time; but he was also a poet, one who made poems 0% cursi, 100% accurate, objective, factual but beautifully made of stardust nonetheless

I remember watching this as a kid. It still inspires today. One of the few things in life that sets the mind free.

@donewithyourshit7303

2 жыл бұрын

You couldn't have said it better 👌

i love this video. it makes me feel much smarter than i really am because Sagan makes it easy to understand, even if it is a somewhat complected topic.

@ImDrizzt

2 жыл бұрын

Well a lot of the assumptions he makes and takes are wrong. But less technology back then. There isnt life on Jupiter. And that life emerged rapidly and fast on the Earth. It didn't atleast a billon maybe even 2 billion years it took for life to form in whatever magma goo that was going on

@markfox1545

Жыл бұрын

Complected?

I remember watching this episode when it came out. I was maybe 11 years old and I hung on EVERY word that Carl Sagan ever said. I watched each episode breathlessly. And I remember vividly the excitement that built inside me as he came down this equation step by step, with growing anticipation for a HUGE number in the end that would finally give me hope that we would (soon) come in contact with another intelligent planetary civilization. ...and then he revealed "10". I was crushed...

@Aguamarina38

Жыл бұрын

I would be honoured to meet him in person. Incredible scientist.

this guy's great, rest in peace buddy

Even if you were to take away his great knowledge and insight into astronomy and such, he would still be quite an amazing human being. He must have been a great teacher with his clarity and calmness. Loved Cosmos.

"its hardly out of the question that we could destroy ourselves tomorrow" as true now as it was then....maybe even more so. Carl Sagan, you were Genuis

Beyond Fscinating. You can actually feel yourself getting more intelligent from watching this. RIP Carl. You and Patrick Moore have given us years of fascinating tv throughout the years.

Carl Sagan writes a Number 2 in a way that indicates he's excellent with facts and figures. The curl he puts in the bottom says it all. Here he is explaining a difficult maths equation that a 5 year old could understand. Honestly there is no one else like him. He was made of good star stuff.

Carl Sagan was not only a great scientist but also an epitome of a kind and real human-being, a great philanthropic philosopher, visionary technologist, a great moralistic teacher for human kind. .an irreplaceable scientist and technologist who devoted an important part of his activities to eliminate public ignorance arounf the globe by being a science populariser.. a real beacon for humanity for years to come!..I wish I had theinguistic powers to express his true greatness in everyday he was...

It's a thought experiment, a blueprint. We don't (yet) know the actual values of most of these variables, but the equation is a great way to start questioning our assumptions about the likelihood of other civilizations existing or not.

The Drake equation and the numbers Carl plugs into it are hypothetical. It's function is not to quantify the actual number of civilizations we might be able to communicate with. It is to show the enormous probability that we are not alone in the universe.

@GuidossInnit

11 ай бұрын

I’d say the enormous probability is that we’re alone not only in the Milky Way, but in the entire universe. We are hugely improbable

@Why_did_YouTube_add_handles

11 ай бұрын

@@GuidossInnitremember there is almost certainly non intelligent life out there so there could be intelligent life

Carl is a fine example on how to be a fine human being... He is missed and remembered...

I wish Mr Sagan was alive today to see all the recent advances in astronomical science. I'd love to hear his incites, he had an incredible ability to make even the most complex ideas seem simple.

This was my favorite part of the old Cosmos. Incredible.

Sagan is truly wonderful, not for his intellect, but for his gift of communicating the wonders of science in a way that the general public can understand. Not a lot of people have that ability.

He is so awesome. He is interesting and good at explaining

This is, perhaps, one of my favourite clips from Cosmos. Marvellously explained.

Pure Legend. I miss him so much

I have always wondered what the world would be like if Sagan was still alive. What would he say of the thousands of planets found by the Kepler. With estimates in the billions of possible undiscovered earth sized planets in the habitable zone of a sun like star.

@JohanStarDragon

10 жыл бұрын

He'd probably be quite ecstatic about the discoveries. On the other hand I have a feeling that he'd be rather disappointed at the rampant stupidity on part of us as a species.

@katiebarnshaw

5 жыл бұрын

maybe if we still had sagan certain individuals may not have been elected into power, if ya kno what i'm sayin

The last number in the drake Equation FsubL, is the most important. Considering that no civilization has contacted us, it seems more probable that N is small, therefore more probably that FsubL is very tiny. This means life usually snuffs itself out after gaining nuclear technologies. That is what the Drake Equation really shows.

@hijtohema

8 жыл бұрын

Jay Apple There are about 7 billion people on this earth of which I only contacted a couple of hundred(s) and a couple of hundred(s) contacted me during my lifetime so far. (many of which are the same). Doesn't mean that those billions of people I had no contact with or of who's existence I'm not even aware of don't exist.

@jayapple6788

8 жыл бұрын

hijothema no but you forget, that all thos people you have not contacted HAVE BEEN contacted by OTHER people. SInce we have been contacted by NOONE, my original comment stands.

@hijtohema

8 жыл бұрын

Jay Apple No because the fact that they haven't contacted us doesn't mean they don't exist. It is even possible, theoretically, that they have contacted each other, maybe even have thriving relationships with trade and everything, because they live in relative short distance to each other but none of them ever contacted us because we live in some desolate place in the Galaxy, far away from them and with no intelligent live in our immediate vicinity.

@jayapple6788

8 жыл бұрын

hijothema ok, i dont want to argue with you. i really wish you would put your opinion in the context of the drake equation. maybe if i have an hour sometime, i will go through it and explain to you

@HeyBusterLuke

4 жыл бұрын

Check out the Fermi paradox - particularly "It is dangerous to communicate"

Indeed. This man is inspiration for so many people.

Amazing video, thankyou for sharing this wealth

If there is one person that could represent us as a species to the possible E.T's out there then it would surely without the shred of a doubt be Carl Sagan. He will be missed dearly on earth.

@madman778 the drake equation sounds perfectly logical and plausable to me. yes, it does get lots of negative feedback much like the ideas of galileo and copernicus did during their time, but im sure that is to be expected in formulating this equation.

Truly beautiful mind!

This is simply fascinating!!

Drake... the rapper. And his Equation.

What we do to other species on this planet we eventually do to ourselves... unless we start treating other species as equals.. we will never survive and colonize space and other planets.

@Crafty420

10 жыл бұрын

We've been known to destroy indigenous humans, who knows what we'll do to alien life. We very likely will be the evil murderous aliens we see in movies.

@Crafty420

10 жыл бұрын

Airik I never said any of that. I simply said that as humans we show up to a new area with a new species of humans and slaughter THEM the HUMANS. I was simply saying that I don't know what would stop us from doing that to aliens. I eat meat and I'm all for survival being the determining factor of us today. I was just talking about how movies show aliens coming and attacking us when in reality I can see it being the other way around.

To this day, I still regard Cosmos as the greatest ever series made for television.

An outstanding scientist and a Wanderer, a curious soul and yes, a Poet. I look forward to the day we venture to the stars. With love, Jacob Sevall

It is amazing ( to me at least ) how many "commenters" out there in cyber-reader land do not understand the Drake Equation . The equation is not ( nor meant to be ) absolute . Obviously, Sagan understood. Sagan himself used the term "estimates" ... do these critics not "see" this ?? Listen again, "knee-jerkers" !!!

Literally fell out of my chair laughing at this chain. Thank you so much everyone.

@lostdaze1145

Жыл бұрын

Literally laughing?

@valikkster

Жыл бұрын

@@lostdaze1145 fucks sake, 8 years later?

@lostdaze1145

Жыл бұрын

@@valikkster one more Follower Dominic 8 years later, ducks drake you finally finished that pond?

This is the best video I have ever watched on KZread

Carl Sagon rocked. I never missed Cosmos.

The one item that was not included in the Drake Equation, and maybe the most important one in regard to any possibility of our discovering intelligent life elsewhere in our galaxy, is "time". What is the chance that at this EXACT time another civilization will also be alive and communicable, let alone the discrepancy between when their communicable message left their planet and headed toward earth? The galaxy is 100,000 light years across and we are in a peripheral spiral. There might be N number as he suggests, but how many might exist right at this very moment in time? Although it was not the premise of the Drake Equation to estimate how many possible intelligent civilizations are out there right now, that number would have to be significantly smaller. It is a subject that I wish could be addressed by Sagan -- alas we miss him so much.

@jries77

9 жыл бұрын

Exactly Bill. Not to mention if their civilization was so much more advanced, why do we think we would have the technology to discern their way of communication? Do they really have to use radio waves? Chances are they are far beyond using our methods of communication.

@lsupersonicl

9 жыл бұрын

But that's what F subL addresses already. We can argue all day on why it may be more or less likely since the equation might not have taken into account non-carbon life for example.

@BillVietti

9 жыл бұрын

BlueLaw I guess I have not expressed well what I mean by "EXACT time". His question is "How many advanced civilizations capable at least of radio technology are there in the Milky Way Galaxy?" Fl is the "fraction of a planet's lifetime that it is graced by a technical civilization". What is the chance that the two fractions of time (ours and another planet's) coincide with one another? In communicating with another civilization, that would definitely be a critical point. Yes, he says that perhaps some civilizations have figured out ways to not destroy themselves. Let's say that they are successful in not destroying themselves for a million years. When did those million years occur? A billion years ago or will it occur a 100 million years from now? Or even 100 years from now? If as he says there might have been "millions" of planets that are capable of technological life, has that happened in the past or will it happen in the future? There might have been "millions" that have existed somewhere in the past or will exist somewhere in the future as his equation points out. How many at this "EXACT time"?

@lsupersonicl

9 жыл бұрын

Bill Vietti I'm going to assume you mean the timelines of when the planets themselves co-exist with each other. You can take us out of the equation since we're alive right now and that's an absolute but it works under the assumption that all planets are about the same age within the millions or so in the Milky Way(our solar system planets are about the same age) and that they have been existing with one another the whole time, therefore, Fl calculations of the fraction of how long life will or has been on a planet is equal to how likely they will be here atm. It's not as though the planets are likely to blow up so much as life destroying itself, it would be incorrect if many planets have existed and been blown up before our planet and vice versa. He did mention that the latter half of the equation is more so guesswork however so what I mentioned should be taken loosely. Edit: Actually, scratch the exact age part. It works well enough if the planets are here with us today since they're more than old enough for evolution and such and the dude says part of the calculation is for life arising on a planet "at least once" to boot. The Fl should still represent how likely the life timeline would exist now.

@WaywardSonVideos

6 жыл бұрын

If we're alone out there at this time, I hope we will not destroy ourselves and populate the universe and create vast biological diversity on a vast number of planets, as would be our responsibility as the "forerunner species".

Via Wikipedia (paraphrased): Problem with the drake equation is that, as you move from left to right on the equation, your variables become guesses. There are variables that are not known and must simply be 'filled in'. It makes the possibilities go from 0 all the way to a billion depending on how you decide to 'fill in' the variables. Essentially, it's answers are anything, and therefore the equation is meaningless. Love that Carl Sagan tho!

@FeelingTehRUSH

10 жыл бұрын

thats the cool part about it. Not to mention it tells you a lot about how you perceive human/intelligent beings nature

@SunnyD698

10 жыл бұрын

It's not meant at this point in time to be an establishment for evidence of alien life but more as a way to see how these variables are put into place.

@crowneproductions9908

10 жыл бұрын

LifeOrbital Definitely see your point and I was mistaken by concluding that it is 'essentially meaningless'. I should have specified that the equation is currently not of much use if one is looking for concrete answers and in that sense it IS 'essentially meaningless'. Nonetheless, it's a very interesting subject and with time, as we are able to confirm variables that are nessicary for the equation, it will go from just being interesting to become confirmatory science. Didn't mean to sound like I was demeaning the Drake Equation though. It's funny how you read back on old comments and are able to see how something you said might be perceived differently from what you were thinking when you wrote it. Oh shucks to this old KZread machine... :)

@DonWilsondigginTimeUSA

9 жыл бұрын

The very act and statement that you quote Wikipedia, dropped any credence or validity that your comment made.

@crowneproductions9908

9 жыл бұрын

Don Wilson You clearly have NO IDEA how wikipedia operates. Still believing the old wives tale about how "anyone can go put anything up on wikipedia anytime they want...etc." Please use the homosapien brain you're privileged to be born with and think for yourself.

That was amazing

فن التعامل مع الاشياء....شكرا كارل

DIS NIGGA REALLY SPEAKS TO ME

@KangarooBird121

9 жыл бұрын

ugh.

There are tons of alien civilizations that talk to each other, they have formed a federation, but we do not know of it because their prime directive is to not communicate or interfere with a planet's natural progression until we're ethically and technologically ready for communication. In Star Trek, Vulcan didn't communicate with Earth until they achieved warp drive, and in the Next Generation a message was found encoded in all living thing's DNA that was presumably encoded by one of the very first advanced civilizations. I doubt aliens are waiting for us to develop FTL travel, I assume they already see us as technologically ready, but right now we are not mature enough for contact. I think humanity needs to get over things like racism and sexism, and stop fighting if we want to join the federation. We need to truly love each other and live in harmony. Then again, this is just my speculation and I could be totally wrong, just a fun thing to think about, that we're periodically observed by beings smarter than us.

@BMurdaDaSteppa

10 жыл бұрын

My sentence needs more clarity, Vulcan didn't communicate with Earth until WE achieved warp drive.

@DonWilsondigginTimeUSA

9 жыл бұрын

You watch too much TV.

@BMurdaDaSteppa

9 жыл бұрын

Don Wilson I haven't watched TV in forever

@OljeiKhan

9 жыл бұрын

NinetyPercentJesus Exactly. No developed and well-mannered alien species is going to accept humans as a reasonable race. Because the majority of human population is made up of idiots. Most people live their lives for money , most people let religion decide for them , most people differentiate each other because of races/colors/sexual choices. And we never stop waging war on each other. I think humans are an evil form of life. Delighted in the manipulation of others to achieve self comfort. And if i were in the commanding position of a reasonable , technologically advanced alien civilization , i would tell my crew " None of you will make contact with humans , let them kill each other and their planet out. "

@haydenharris5060

9 жыл бұрын

I LOVE Star Trek TNG :)

Laughter is good for the soul, glad I could be part of it! I kind of got a kick out of what was a bit of a triple entendre.

hopefully there are millions of them! so much more interesting for a story perspective!

I never liked this equation. there are so many more variables that aren't in the drake equation. Life is probably everywhere. Intelligent life that is able to build civilizations and that exists at the same time that we do and that we would ever be able to be in contact with is just about 0. not 0 but close to it. of course I hope im wrong.

@theproplady

10 жыл бұрын

Airik One main variable is the existence of a large moon like ours. It's speculated the tidal action of the moon contributed to the development of early bacteria in small ponds and the moon acts as a rotation stabilizer, making it so that our planet doesn't wildly tilt on its axis, disrupting the climate. Without a moon exactly like ours, higher forms of life would be virtually impossible.

@GawnFishin

10 жыл бұрын

Airik What impact different religions would have on the willingness to develop technology by different civilizations?

@zestyorangez

10 жыл бұрын

theproplady just because life developed on earth that way doesn't mean it's required for all planets.

@brendan1871

10 жыл бұрын

+zestyorangez Of course we could be the only intelligent beings in our galaxy or even the universe. The intriguing hypothesis/theory* that attempts to refute this way of thinking is that life is a pattern and like all patterns they will eventually be repeated at some place at some time statistically. The simpler the pattern the shorter the distance and time span you have to travel. For instance, I could pick 5 atoms in a specific arrangement and sooner or later I would find the same pattern disregarding The Uncertainty Principle. By this principle in probably one hundred googol years and light years (I don't know the exact calculations) the chance of finding an exact copy of earth with the exact same lifeforms and history would actually increase. That is pointless speculation, but the point still stands that just finding a pattern of RNA/DNA and therefore life is low when going star-to-star but high when considering the massive amount of existing stars with the fact that new stars 'constantly' being created (I don't mean stars are created in seconds) *I don't feel like calling it either a hypothesis or a theory because while this has not and perhaps never will be proven on large scales like I mentioned, I believe it has been proven on small scales.

@tonyblackmon4200

9 жыл бұрын

I agree with your take on it, the time that a civilization exists in, during the entirety of eternity , would be a huge factor. If you take that into account , If any two civilizations come together at all, one of the two would be a fossil. just my humble opinion

Yes but technological ≠ intelligent...

@dragospahontu

Жыл бұрын

How?

@fromnorway643

Жыл бұрын

Maybe _wisdom_ is a better word than intelligence regarding if and how we avoid being destroyed by our technology.

@leriku2270

Ай бұрын

@@dragospahontu I mean we like to think of ourselves as technological but I wouldn't call most of Humanity 'Intelligent'

I love you, Carl Sagan!

Carl Sagan - Cosmos my favorite doco

amazing open mind

Carl Sagans best studies of the universe!

I can remember the moment I learned of the Drake Equation reading Sagan's book. It was mind blowing.

im so lucky to find it video im amazed

Awesome

You, my friend, are brilliant :D

LEGEND !!!!!! r.i.p.

thank you very much for enlightening that man's mind a little bit

Exactly!

Cheers man!.

I'm with you on this one

i love you carl sagan

Carl Rocks

I love you Carl Sagan,I love you so much

YES. YES YES.

Mind = Blown

I agree wholeheartedly with your approach to probabilities. I have never carried a weapon in a public place and have consequently been killed on a number of occasions.

It is pretty mind blowing. :)

A great scientist, visionary and storytaller. It is a pity that the world does not have today a scientist of his caliber to keep inspiring young people to become scientists and give simple answers to very complicated problems. If the world had listened better to him 40 years ago we would have fewer problems with climate change today. He has a place in the Pantheon of the brightest scientist minds of the 20th century

we are learning today that the Drake Equation is at best a minimal synopses of what may be a tremendous value for the possible creation of life in or on other planetary locations, no matter how far away they are. The idea that on some far distant planet some other civilization may be pondering the very same things that we do is actually possible. I think that is fantastic!

@Fraterchaoraterchaos

9 жыл бұрын

I hate to say it, but Carl made a mistake at 4:05... he says that if each planetary system has ten planets we would have 100 billion planets, then estimates 2 planets per system as being able to sustain life.... then multiplies 100 billion by 2.... that's incorrect (and I'm not even very good at math... it should be 100 billion times (2/10) (only two out of every ten... not two times ten)

@DonWilsondigginTimeUSA

9 жыл бұрын

well, give or take a few!

@cav4290

7 жыл бұрын

No, you are wrong. He says there are 100 billion planetary systems, NOT planets. The numbers he uses are: 400 billion stars in our galaxy, and only 1/4 have planets, meaning 100 billion planetary systems, of which EACH one has TWO planets that can sustain life = 200 billion.

This is the greatest thing on the internet..

It's amazing. We chose life like this guy pleaded. We are well on our way to changing our ways. We've got a way to go, but at least we're moving that way. It's amazing how much we have progressed in the 22 years since the cold war ended.

@danieljoseph6404

Жыл бұрын

I see that this comment was made 12 years ago. What do you think about the progress that we've made so far now?

this just aroused my curiosity even more

Sagan's the man.

I went from listening to Drake to watching this and i genuinly enjoyed it.

That was an amazingly fast response.

This whole video could be quoted in someone's facebook status. Particularly, "It's not out of the question that we may destroy ourselves tomorrow." Chillingly accurate, 40 or 50 years later.

@JokerFan252 You genuinely made me lol, I thank you for that good sir.

Science and Technology has progressed so much since his passing. If he were alive now he would be in awe.

By the time Carl Sagan do this video, many things have happened. We're in the middle of nuclear catastrophes but at the same time, there is a fast pace growing number of human awareness. By this time (2022) connected human consciousness is more and more, evident. Millions of humans beings are aware of our position in the universe and why we still have not ready to enter in this vast community of stellar civilizations. But the time will come when this lonely feeling (embedded in Carl's message) will be gone. Let's continue working together.

It's funny to look back a Sagan's videos and watch him reference the impending doom of nuclear weapons. I'm glad he lived to see the end of the Cold War.

@atmavictu2995

Жыл бұрын

HOW ABOUT NOW?

This is one helluva thing to listen to whilst playing Spore.

Thanks for the tip (I can't believe I missed out on that...also normally I resort to some other online dictionary.. I must have been lazy that day) But right on! Carl was and is awesome and wise and whatnot. I really hope we make it through. I just found out my girlfriend's pregnant. I really hope we make it through. For our children's sake. Peace!

@roselynebona7887

2 жыл бұрын

Hi! I know that your comment is from 9 years ago, but I just want to know how you and your girlfriend (?) are doing (and probably your children too). It's just too awesome to see comments from years past. It's like seeing a part of that person that they left behind.

The Whole Universe Is A very Big Place Indeed...Keep Lookin Space Will Never End....

Very true.

What an intellect, what an orator; he lit the fuse of curiosity in all if us as teenagers.

@ 4445au: such a good point you make, and one that people need to be more aware of. If life can indeed take on different biochemical forms, then this would provide further positive multiplication within Drake's Equation... But even with Sagan using conservative numerical values, the implication is that there were/are a handful of life forms in the Milky Way galaxy.

well explained, warmly done!! and yet I don't think we have a clue yet what the real odds are ...

@fromnorway643

Жыл бұрын

The Drake equation isn't meant to give any definitive answers as it's only a way to help us ask the right questions that might narrow down our uncertainty as we get more information in the future.

Yes, it's a very cool thought. :)

@leahcimrac Many people have updated the Drake equation. Unfortunately, new obstacles on planets being life bearing are out pacing the additional planets.

@Desire4PyroClem Never thought I could find a comment on KZread to be profound, but I felt as though all my feelings of loneliness lifted away immediately after reading what you said. Thanks so much, I needed that.

When he was talking about possibly livable planets I believe he was taking in to account things like Titan (Saturn's moon) etc, places where we still believe it's feasible life may be in some sort / have arisen at some time.

I was about twelve years old when I started reading H.P. Lovecraft and since then contacting alien civilization has been a nightmare of mine.

Every living moment of your life and the next guy's is a memory, if we weren't already living in the past we wouldn't know anything.

Interesting!

How could anyone, even 27 people, POSSIBLY dislike this video, let alone this man?

@ceesmith

Жыл бұрын

Because idiots, trolls and waywards will always be around.

Carl Sagan will now be my physics teacher for the summer.

Such a significant man on a such an insignificant planet.