How are we searching for Extra Terrestrial messages ?

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We been searching for intelligent life outside out planet for over 100 years and yet we still haven't found anything that provides solid proof that is out there. So in this video we look at how we are seaching to find E.T.
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Written, Researched and Presented by Paul Shillito
Images and footage : BerkeleySETI, NASA, ESO, ESA, VLA, Ohio State University,
andys-arcade, Astro-Physics Community
And as always a big thank you also goes out to all our Patreons :-)
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[@Cenotaur1]

An idea for a future episode: what would happen if a verified signal was received?

[@tonywood3660]

Panic or hide...

[@user-ni7ct5vr8u]

Practically it would most likely not happen anything at all. The signal would probably come from such a distance that we can't send a reply that arrives to them within our lifetime. However, it could affect things such as religion that assumes humans are something special.

[@Digi20]

In practical terms nothing would change because the signal would be from so far away that, without inventing warp drive, we could never reach it. and it could easily be older than the dinosaurs.

[@TheManLab7]

@@user-ni7ct5vr8u religion can go duck itself! 😡 Why BILLIONS of people believe in fairytales is beyond me 🤦🏻‍♂️ The world would be a much nicer, happier and safety place to live in. It also wouldn't of held back 100's of years of science and innovation. I couldn't even IMAGINE how advance the world would be if someone didn't invent religion 😪

[@Bow-to-the-absurd]

The person who identifies the signal panics and crashes his car down mountain whilst delivering the message...

[@campsitesweden]

I rarely subscribe to new channels I find, but this is one of the unusal ones. I have never come upon someone explaining complex matters in such a down to earth way. Clear, understandable. Keep it up!

[@TheDerperado]

Curious Droid is one of my favourite YT channels out there.

[@jamese9283]

"I rarely subscribe to new channels" Try to be more open-minded. There's lots of good ones amid all the chatter.

[@qqqsfdf1232]

Have you tried Scott Manley?

[@georgem4713]

This one's a keeper. Worth your time.

[@justinwalker4475]

@@qqqsfdf1232 crap shirts

As far as I'm aware, 1420 MHz was chosen because it would be a sensible thing to be looking for (there's a lot of hydrogen in space), but there's also not much in the way of noise on that wavelength which makes it easier to detect. Those signals still aren't going to make it very far before they lose enough energy to just look like noise. We don't have the transmission power to reach very far in general (comically speaking).

[@AttilaAsztalos]

Probably a good thing. "He who wields the biggest fist rules" strikes me as a far more universal thing than the "Oooh, we're such an advanced civilization now we'll never use force for arbitrage again" rosy-glass bullshit.

[@zeitgeist2720]

@@AttilaAsztalos 😑

[@lordgarion514]

Voyager is sending back data using a 14 foot antenna with just 23 watts of power.

[@iivaridark6850]

1420? Well, I found some intelligent life there! There was some unintelligent too...

[@cat22_a1]

@@lordgarion514 A directional signal aimed at Earth and a tiny fraction of the distance to the nearest star.

[@laurel5432]

Really enjoying the humorous remarks. Awesome video as always

[@Noneofyourbusiness2000]

Making fun of bad investments then saying we should invest more in looking for aliens is funny, but not in the way that was intended I believe.

[@Robbie-mw5uu]

It wasn't really funny, it just gave me second-hand embarrassment that he inserted a dumb personal opinion into one of these videos. Telling other people how they should be spending their money is infantile.

[@MrCarlozan96]

@@Robbie-mw5uu buying twitter because nobody likes you and setting a world record for most money lost instead of using your money for good is worthy of ridicule.

[@TheDoctor1225]

@@Robbie-mw5uu Similar to ad hominem attacks because someone expresses their opinion and you didn't like it, I presume.

[@Noneofyourbusiness2000]

@@TheDoctor1225 It wasn't an ad hominem attack, as it wasn't an attack. It's called a criticism, and since it wasn't hostile, is wasn't an attack. It's OK to make a criticism in the real world by the way. Go back to your safe space now.

[@ken7165]

One problem with all of this is that if a species advanced their technology so they no longer use radio then we’d never detect them. That is a distinct possibility.

[@swatboy763]

Not to mention there is no reason for *them* to keep using radio alongside their more advanced methods. After all it could be possible that the aliens their trying to contact haven’t developed tachyon radios, or other advanced communication.

[@justinwalker4475]

@@LiveType whoosh o0

[@justinwalker4475]

@@LiveType thats right fella we got it all figured out nothing more to learn or see here

[@dcw56]

It's amazing that even though I have little interest in the subject of SOME (few) of your videos, I have yet to find one that did not hold my attention and sometimes even captivate me. You are such a good researcher and spokesman for your channel! Well done, Paul.

[@MicahTischler]

I may be mistaken, but I thought NSF had said, very clearly, that Arecibo was NOT coming back. :(

[@InconsistentManner]

15:17 you mentioned Arecibo "up and running again" Do you know something that the rest of us don't know? Did the NSF quietly say they are repairing or rebuilding?

[@disorganizedorg]

That caught my ear too.

[@TheRadiastral]

He actually said "when it's up and running again". As in, when repaired and back in action (hopefully) in the future.

[@cyankirkpatrick5194]

Yes they announced it a few years ago that they were rebuilding it and it was going to be bigger and better equiped.

[@NLShArKNL]

Always gives me a smile when I see one of your videos in my sub box, keep up the good work!

[@MatSpeedle]

A fantastic overview Paul, thank you! I agree with your final sentiment about looking for intelligent life on earth first... Sometimes you have to wonder.

[@carldori6172]

Thank you Paul, as always content that is interesting, informative and well presented.

[@gaming_henry]

Whilst our signals may have reached the nearest 1000 stars, but the signal to noise ratio makes detection really limited for detecting radio leakage. Only strong directed repeated signals could be realistically detected

[@clavichord]

Yes, ideally you'd need a high power directed beam of a very narrow band signal, for example just a carrier of morse code or a data pattern using carrier frequency shifting. You need to bundle the power and get the signal to noise ratio as low as possible... and then there's the barrier of light speed. Sending a signal to the Andromeda galaxy would take about 2.5 million light years to arrive, even if you send a strong enough signal from earth to be realistically picked up

[@dziban303]

I thought Arecibo was beyond a doubt retired? NSF said no to repairs, didn't they? Edit: yes, in October 2022 NSF categorically ruled it out.

[@simongeard4824]

Yeah, sadly, there are no plans to rebuild... it will never be up and running again.

[@chrisd2646]

After watching this excellent video, I did go and search to see if NSF had changed their minds, but it looks like Aracibo will still not be rebuilt or replaced, sadly.

[@djpalmer31]

Great video. Paul's last comment reminded me of these lyrics from Monty Python's Galaxy Song "And pray that there's intelligent life somewhere up in space 'Cause there's bugger-all down here on Earth"!

[@Nickle314]

The big issue is the one over r squared issue. The more advanced, the more trasmitters. Equally, the better the amplification so the less power that is needed. I suspect they are just too far away.

[@strangelee4400]

Or they are dead. Civilisations popping up and disappearing like fireflies (on the cosmological timescale).

[@TheEvilmooseofdoom]

Distance is the problem.

[@engineeringvision9507]

The assumptions about Aliens are very human centric. How long would it have taken human Africans to develop the radio independently?

[@MattyEngland]

@@engineeringvision9507 About another 50,000 years.

[@beeftec5862]

Always have great video subjects Paul, at top quality. Thank you.

[@wizzardofpaws2420]

As usual and as expected, a very brilliant video documentary from the Curious Droid

[@satyris410]

Congrats on 1million subscribers. Easily one of the best researched, written, and presented KZbin channels

[@SaturnCanuck]

Another great essay, Paul. II loved your final summation...

[@TomisaLami]

Please do not ever stop making your videos I love them

[@_Frank_the_Tank]

Reminds me of an episode of South Park from like 20 years ago where Earth is just a reality tv show watched by various alien beings all over the universe... If intelligent life is out there I doubt they'd wanna talk to us, they'd just tune in to watch the dumpster fire that is modern human society.

[@DavidSmith-oy4of]

Maybe on some other planet they have similar silly political systems where "leaders" are showing their population how things are on Earth then saying "at least we're not as bad as they are". They all avoid us so they can use us as the case example of how not to do things.

[@BoomBrush]

Literally the plot of the simpsons hit and run lol

[@jfgenie]

15:45 - Best end of video punch line ever! Love it!

[@Scramjet44]

The main problem which you touched on is time. Although you said "Also that any intelligent beings are active at the same time as us" there is the problem of the time it will take for any signal that we can understand reaching us. Alpha Centauri is 4.367 light years away from us which means it takes that length of time for any signal in the electro-optical range travelling at the speed of light to reach us and for anything further away it will take a correspondingly long time for any signal to reach us. If there is an advanced civilisation even only a hundred light years away from us and we were to receive a signal we could understand from them now, they will have advanced another hundred years technologically since they sent that signal and will have advanced a further hundred years by the time we have sent a reply even if we did so right away. This problem only gets worse as distance increases which could mean that any civilisation that sends a signal to us may have died out by the time we either receive their signal or by the time they would have received our reply. The posibility also is that we could have died out by the time that any civilsation sends us a signal if they are a significant distance away from us and decide to reply to our transmissions when they receive them as sending and receiving signals is twice the distance in light years which very quickly doubles the length of time for any interaction between advanced civilisations.

[@jannek5757]

21 years and about 7-8 different PCs I used to crunch seti packets. Too bad it is not available anymore :(

[@sonykroket]

I remember those days..............memories....

[@chrisplatten2293]

Sadly, I crunched SETI@home and the mersenne prime search not Bit Coin in the early days...

[@Skracken]

I used to contribute to SETI@home back in the day. I had like 4 machines of my own up and running with it, and I use to sneak it on to other computers as well if I could. :D Later I moved on to Folding@home for a good while. But now I do neither. Computers nowadays take too much power, and electricity prices are through the roof lately

[@gdutfulkbhh7537]

Energy to run a computer is no more expensive that energy to run an electric heater. I used to live in an apartment equipped only with electric heaters, so I set up computers running SETI@home instead. As you know, the project’s over and it never found SETI... but it was fun to try.

[@Skracken]

@@gdutfulkbhh7537 Well I don't have electric heating :) But yeah if I did I would be folding or mining crypto

[@StaK_1980]

Top quality, as always. One question: have you ever considered being on Nebula streaming services? Your content is right up there and I could see you being there too.

[@burntnougat5341]

Please no

[@StaK_1980]

@@burntnougat5341 ?? May I ask, why? Why do you think that it would be a bad idea?

[@burntnougat5341]

@@StaK_1980 streaming service fatigue. There are simply too many and needing to subscibe to yet another one just to watch a certain channel is very off putting

[@alakhazom]

With care,with awe-and a huge dose of what got the cat to the afterlife !

[@ianholmquist8492]

Curiousity killed the cat, but satisfaction brought him back.

[@adamjames0710]

I live near the Jodrell Bank radio telescope in Cheshire. that has a great history and story. I'd love if you could do a video on that please.

[@Joe-KN4IFI]

Arecibo Radio Telescope up and running again? That's a good one. All the money we blow every year and know one wants to rebuild her. What a shame.

[@WaltTFB]

'...and pray that there's intelligent life somewhere up in space, 'cause there's bugger all down here on Earth'

[@richieismyhero]

It's hard enough to find intelligent life in my street!

[@sonykroket]

There is life out there but the universe is too big for meeting up.

[@Gary_Hun]

By walking for sure.

[@peterj5751]

We think, based on our current knowledge of physics and technology.

[@sareeyemanusqaame8723]

As a nomadic baby in Abyssinia/Ethiopia occupied western somalia I had seen an extraterrestrial beings in the country side. I was standing near my auntie two men in what I can describe now Mazda MX-5 appeared like 40 feet from us they look at me, smiled and signalled I go over to them and instead I stepped towards my aunt and clinched her skirt/blouse they flew in vertical circle in the air in extreme rate of speed and disappeared into the sky. I can NEVER forget that experience. Now sometimes I wonder what would happen if I had went over to them, sometimes I wonder if they were intending to reunite with my deceased mother and were trying to avert troubled life and neglect to come. This was before I knew what any form of transportation was or any type of television was or had access to them let alone UFOs or extraterrestrial topics or discussions.

[@incognitotorpedo42]

Aliens in those days used Mazdas due to their excellent fuel economy and good handling. They now use Teslas, which have better acceleration and lower operating costs.

[@sareeyemanusqaame8723]

@@incognitotorpedo42 we are on different frequency!

[@sten8912]

when i saw the thumbnail comfortably numb instantly started in my head

[@PaulJohn01]

I was so excited to see a new @Curious Droid video, i gave a "Like" to the Squarespace Ad 🤣🤣🤣🤣🤣🤣

[@frankgulla2335]

Thank you, Paul, for a great summary of the current state of SETI.

[@berttorpson2592]

I just finished the first book of the Three Body Problem. Spooky spooky

[@flightmaster999]

Great video again Paul!

[@bondisteve3617]

Thanks again Droid.

[@faroncobb6040]

The reason nobody is willing to put significant money into SETI is that our understanding of what advanced aliens might be like has advanced since the 70's. We now realize that anyone even a couple hundred years more advanced than Earth would have large telescopes in space capable of detecting the presence of oxygen on earth from thousands of light years away. We also understand that with anything even vaguely close to self replicating machines it would be relatively easy to capture a harness a fraction of the local star's output and send probes or manned spacecraft to any other systems where life has been detected. That same capability would also allow any alien species to spread across the entire galaxy in only a few million years, a tiny fraction of the age of the universe. If intelligent alien life was common, at least some species would have managed not to kill themselves off or would have created immortal AI successors long ago, and finding at least some of those aliens would be as simple as checking my KZbin subscriptions. The fact that I am not subscribed to any aliens on KZbin gives me an extremely high confidence level that any money spent of SETI will be wasted.

[@chuckygobyebye]

I have to correct you at 4:05. HG Wells very much said that he based War of the Worlds on the colonisation of Tasmania by Europeans.

[@SimonHollandfilms]

excellent comprehensive research

[@punditgi]

This channel definitely shows signs of terrestrial intelligence! 😊

[@757Poppy]

One issue not covered would be the effect on a star's output due to a Dyson sphere / swarm.

[@Vorador666]

Great episode, thank you so much again for the amazing content you provide.

[@Cynsham]

Paul you should do a video about the SR-71! You have great videos on other iconic planes of history, but somehow you don't have a video about THE single coolest aircraft ever built or flown.

[@KsCHL1]

Another awesome video. Thank you so much Paul

[@Virtueman1]

Best channel on youtube

[@ideadlift20kg83]

The problem with this is that any alien finding our signals would ignore them because they are also searching for intelligent life.

[@DavidCowie2022]

SAVE MY ACHING SIDES!

[@marckyle5895]

@@DavidCowie2022 You know how I know that the people who claim they were abducted are lying? Because aliens lock their doors while speeding thru our neighborhood. You didn't see Oumuamua slowing down to ask for directions or teach us a new ringtone, did you?

[@Edu_Selva]

Nice! I hope they hear us and come save us! We are in dire need

[@MattyEngland]

Once they realised that we can't even differentiate between a man and a woman, they'd probably turn around again.

[@_Frank_the_Tank]

@@MattyEngland maybe we'll get lucky and they'll haul off a few of the rainbow/alphabet weirdos to keep as pets

[@MattyEngland]

@@_Frank_the_Tank 🤣🤣🤣🤣🤣 My favourite comment of the day.

[@chrisplatten2293]

Dark Forrest cured me of that hope

[@puirYorick]

This is perhaps the first video on this topic on YT that has even touched on the difficulty presented by the need for the mystery alien source to have created a suitable signal in a *time* frame that lets the signal reach us while BOTH civilizations are simultaneously at a near enough level of sophistication to even grasp what the event means AND be able to do anything useful about it. All other analyses touch on the vast volume of space and the quantities of possible frequencies and/or means of signalling. As the cosmos expands more and more possible places (and therefore their energy signals) move permanently out of contact range by near light speed though a few may be zooming alarmingly nearer.

[@Cemi_Mhikku]

15:17 They announced last October that they won't be rebuilding Arecibo...

[@rhelyk7893]

"or the Arecibo telescope when it's up and running again" Wait, is Arecibo being rebuilt? Last news I heard was that it wouldn't be, and a quick google search confirms as of October 2022, did this change again?

[@cyankirkpatrick5194]

Yes it's being rebuilt and it's going to be huge and better equiped.

[@pr0hobo]

@@cyankirkpatrick5194 source?

[@cyankirkpatrick5194]

@@pr0hobo a channel here on KZbin two years ago.

[@davidmccann2633]

Absolutely astonishing mate love this show always watching good on ya mate 👍

[@zandvoort8616]

There might be intelligent life out there but it’s very difficult to transmit info or survive long enough to be truly interstellar.

[@ChaoticOrcPaladin]

Fantastic as always!

[@jackglossop4859]

Curious droid never disappoints me

[@patreekotime4578]

Over the course of deep cosmic time it seems incredibly unlikely that a species we could detect would be active at the exact same time as us. Billions of civilizations may well have existed, just at the wrong time/distance.

[@NANDOFFDataRecovery]

Excellent video.. Thankyou as always Paul. 😎👍

[@shaider1982]

15:43 Lol, best burn ever🤣👍

[@andrewmcalister3462]

3:14 If this had been translated as Cannelloni, science fiction would have taken a very different track.

[@marckyle5895]

Mars would be the home of the Flying Spaghetti Monster, praised be his noodly appendages!

[@ManuVerhelst]

Nice video as usual. One small correction: the first person who was mentioning the big bang was a Belgian catholic priest, Georges Lemaitre.

[@syringistic]

Thank you for the awesome video Paul! Are there actually plans to rebuild Arecibo? Last I heard it was too damaged.

[@Darryl_Frost]

Why does no one talk about the inverse square law and signal strength? For all the signals we 'leak' into space none of them are at any power level that would be detectable probably at even 1 light year. Let alone 50 or more. Even under optimal conditions, those signals will be well below the noise floor and impossible to detect. This is just basic radio theory 101.

[@TheEvilmooseofdoom]

You make a valid point. There is no denying it.

[@thetezz0001]

Excellent video bro

[@jay_kay709]

aliens probably found tiktok and decided not to answer our calls.

[@amirm3621]

Then they should be really close. First, tiktok videos are detectable in less than 10 light years.

[@ranua9327]

There will come a time when tiktok will be considered for elder people... I fear that time...

[@engineeringvision9507]

They can't be that close

[@vincitveritas3872]

😂😂😂

[@amphibiousone7972]

😂🤣😂🍻

[@rotoscopic8757]

There are 2 Possibilities: They are unable to Respond They are unwilling to respond

[@goldfish2289]

Hope you are doing good now bro. Thanks for the video 👍

[@davidkymdell452]

Hello.....is there anybody IN there...just nod if you can hear me...is there anyone home?

[@MattyEngland]

Nope, Bidens head is completely empty of all matter

[@AndriusKamarauskas]

6:02 while it's true that the antenna is a product of wavelength, also is true that signal loss over distance decreases with inverse square law. It's very beneficial to have as big reflector(dish) as possible to maximize sensitivity (gain of the antenna). Therefore the advantage of using small antennas is wrong here. -last year PhD student of Physics (playing with microwaves)

[@earthknight60]

An unmentioned issue is signal attenuation. Sure, we've been sending radio signals out for more than 100 years now, but due to signal attenuation those signals are not detectable at that 100+ ly distance. Our own signals are pretty much undetectable at distances greater than around 6 ly, as as we improve the efficiency of our electronics that distance is *lessened* not increased as we don't need to broadcast using as much power as we did in the past. Long ago I took a course from Frank Drake and one of the things he proposed was that as a civilization advances it becomes more and more quiet, therefore harder to detect. As simple example of this idea is moving from broadcast TV to cable TV; the former you can detect remotely if you're within the signal attenuation bubble, the latter you cannot.

[@ok0_0]

"Is anybody out there?". Yes, Me.

[@laurel5432]

I live in your walls

[@vpheonix]

So no intelegent life then? Just kidding

[@ok0_0]

@@vpheonix none at all my head empty

[@ok0_0]

@@laurel5432 I will burn this house down

[@steveshoemaker6347]

Thanks for the excellent video Paul.... Shoe🇺🇸

[@peuterschmidt]

I thought Arecibo was not going to be repaired?

[@tomnoyb8301]

While Seti looks for narrowband signals, Shannon proved ultrawideband signals travel with the lowest energy-per-bit (In other words, with the most efficiency). Seti's wasted decades looking in the wrong place.

[@mopnem]

Great overview here

[@porscheguy5848]

Please do a video on underground nuclear testing!!!

[@wormnail6569]

Very nice. Let’s see Paul Allen’s telescope array.

[@oGPoLa]

For a second i read that as "extra testicle"

[@madnessbydesignVria]

Many ancient cultures have stories about 'people from the stars' visiting us. There have been countless sightings of possible extraterrestrial vehicles (there may well be alternate explanations, to be sure). Perhaps they have already made contact, repeatedly. Perhaps they were testing the waters, and saw fear and xenophobia. They could be forgiven for thinking they might not be welcomed. Perhaps they walk among us, and are taking note of how we prioritize war over science and exploration. There are infinite possibilities for 'why' we haven't found them, yet. When I was a child, we were told nothing could live at the bottom of the Mariana Trench because the crushing pressures, lack of light, and toxic sulphur vents, created a completely inhospitable environment. It was impossible. Then came the deep-sea probes. They found that not only COULD life exist, but it was abundant. Unimaginable creatures thrived in the nightmarish depths. This is why I dismiss anyone who says "It can't be...". It can. We've only surveyed a tiny fraction of our galaxy - with extreme tunnel vision. I fully support the search, but it's way too early to draw any conclusions... :)

[@ck9103]

It was a sad day when SETI@Home shut down.

[@Robbie-mw5uu]

I used to use that! Using BOINC. Tbh, people are less likely to volunteer for that stuff these days when electricity is so expensive and people would rather use that computer power to mine cryptocurrency than donate to science.

[@peppergrowmienola4850]

As always, I love the videos. But, Paul..... What about the shirt bro? Please bring back the closing shirt info.

[@TheAeroAceMix]

I love you dude/droid. Love your vids

[@Outland9000]

Might be a little petty of me but I particularly enjoyed the subtle dig at Musk and Zuck.

[@Roboheart1119]

Excellent video 👍

[@KamalTalukderCaptainNemo]

Another nice shirt!

[@nicholasrigg8999]

As you said, we are searching for something we would recognize as intelligent using technology we understand. This could well be the limiting factor in measuring success. Besides, as many have said, we may not like what we find...

[@mikechan231]

Yes, I have been searching for intelligent life here on earth for a while now, with limited success….

[@TrumpsEarBandage]

Ohh, you’re so advanced

[@mikechan231]

@@TrumpsEarBandage but I am

[@ball5718]

Super interesting video! Thank you. Just a small fyi - there is a typo in the patreon credits at 1:15-1:20 it says "thier" instead of "their"

[@oldhairpin]

The tic-tac videos from the US Navy pilots surely demonstrate that first contact might be through extra terrestrial probes that whilst perhaps unable to carry lifeforms, can probably carry information and communication.

[@robinhodgkinson]

Given the universe is 13 billion years old yet quiet as a tomb. Life is rare. Or at least Intelligent life, extraordinarily ludicrously rare. We look at every corner of the universe and all we hear is static. I suspect looking for other intelligent life is close to a waste of time, as much as I would like it to be otherwise. And as far as sending messages. You’re kidding right? By universal standards the speed of light is pathetically slow! We might reach them in 3000 ( or 300,000 ) years. Then wait for an answer. And are they going to be looking for modulated electromagnetic radiation… I think we’re kidding ourselves.

[@NemeanLion-]

What are the odds that another civilization is at the exact same stage of development as us and want to communicate through radio signals anyway? I think it’s very remote. We went from the Wright Brothers to the moon in less than 70 years. Any civilization that’s out there is either advanced beyond comprehension, or they’re tadpoles swimming in a pond.

[@robinhodgkinson]

@@NemeanLion- Absolutely I didn’t mention the timing issue as you have. In another 50 years using electromagnetic radiation might be old school for us! Quantum field resonance ( or whatever : ) might be the new thing! We like to think of ourselves as technologically advanced. Lol. We’re not even remotely close. We’re still using “fire” to get off this rock!

[@TheEvilmooseofdoom]

The distance is the problem. A civilization 100,000 ly away in our own galaxy that broadcast for a thousand years before dying could be 10's of thousands of years before it gets here.. The scale screws everything up. Any signal we get will be old very old and there will never be 2 way communication.

[@robinhodgkinson]

@@TheEvilmooseofdoom Yep. You got it. People can't conceive of the time and distance scales of the universe. Including me. Communication, at least by means available to us, is a futile effort for all of the above reasons.

[@Chris-hx3om]

Oh man, do you know how many people I have had to try to explain that to!

[@Axel_Andersen]

I've tried to search answer to the following, which I'm sure has been worked out. What are the odds of detecting ET life assuming it exists? What I'm driving at is that: Any receiver has limiting minimum signal strength that it can detect. Transmit power is limited by willingness of the society that builds it to commit the resources to an audience that is unlikely to hear it and unable to respond. Any transmitted signal diminishes according to inverse square law. Any directional antenna, transmitting or receiving, improves the signal in inverse relation to its directionality. So the better the antenna the smaller the area of sky/space it can cover and thus when we make the antenna more directional we maybe seeing deeper into the space but we are seeing a smaller angular are of the space. To me it seems that there must be a limit how far we can 'see' or 'hear' into the space and how large our coverage of the skies are. For a starter we could assume a society might be willing to commit a nuclear power station worth of energy for sending a 'hello' signal out. Because of the directionality problem it would probably makes sense to use an antenna that directs the signal to the 'disc' of the local galaxy. We have some idea how sensitive we can make the receiver and we can assume the receiver s also using an antenna optimised to receive signal from the local galaxy. From those we could work out how far could that signal be detected from? I bet that is not a big distance compared to the size of galaxies.

[@johnb8854]

Ref. Quote; What are the odds of detecting ET life assuming it exists? *Discover and understand the DIFFERENCE, between the species, ( of the universe including the Earth ) and "LIFE The Real Self", which is Non-Dimensional, and in NO WAY represents, nor even remotely looks anything like any species, including the human species !*

[@Axel_Andersen]

@@johnb8854 ??

[@andersjjensen]

Hah. That exit statement was a hilarious bitch slap.

[@SpeedSmith]

Great comment / swipe. Nice.

[@skougi]

you and anton are on the same wavelength. love seeing this topic! people tend to write off looking for life because of the statistics when the actual evidence says it's empty out there. that's the fermi paradox. where is everyone? maybe the great filter is how we go about answering that question. I say we start acting like we're the first life that has any chance of surviving off planet and make it a certainty. go from there.

[@groundsgrounds3002]

I saw a great lecture called "why we might be alone" its really worth a watch

[@anthonymichna7900]

6:59 “Thee” Ohio State University: is the correct pronunciation. P.S. Long time fan of your videos

[@fermisparadox01]

THE Alabama University Roll Tide

[@anthonymichna7900]

@fermis paradox1 The University of Alabama: is the correct name. Troll tide

[@zeon5323]

Are they rebuilding Arecibo?

[@cyankirkpatrick5194]

Yes.

[@esmenhamaire6398]

Uh, I thought it was decided (wrongly IMHO) NOT to build a new radio telescope at Arecibo?

[@TheOtherSteel]

1 - We have only been listening for general radio signals from other civilizations for less than 100y out of 13,800,000,000y. 2 - SETI primarily hopes to pick up powerful radio signals from Kardeshev-III civilizations because we could hear them with our equipment at long ranges. I wonder if any such civilization would even use radio. 3 - I think interstellar communications are most likely going to be by laser. 4 - Can anything we use to listen for alien radio signals pick up lasers of radio frequency? 5 - If aliens are using lasers above radio frequency, I'm thinking none of humanity's equipment being used to listen will pick up any of it. 6 - There is always the possibility that aliens with a few million years of development could communicate at long range using methods that are unknown to us. 7 - Keep an ear out, but given our microscopic slice of listening time, and the possibilities other communication formats, don't make conclusions about whether there is anyone active out there.

[@Giratina143]

LMAOOOOO The last line as well as the funding comments hahahahahaha