Science

Extraterrestre: La humanidad ante el primer signo de vida inteligente más allá de la Tierra

Extraterrestre: La humanidad ante el primer signo de vida inteligente más allá de la Tierra

  • Downloads：3046
  • Type：Epub+TxT+PDF+Mobi
  • Create Date：2021-05-22 01:51:08
  • Update Date：2025-09-06
  • Status：finish
  • Author：Avi Loeb
  • ISBN：6070775279
  • Environment：PC/Android/iPhone/iPad/Kindle
  • Download

Summary

Harvard’s top astronomer lays out his controversial theory that our solar system was recently visited by advanced alien technology from a distant star。

In late 2017， scientists at a Hawaiian observatory glimpsed an object soaring through our inner solar system， moving so quickly that it could only have come from another star。 Avi Loeb， Harvard’s top astronomer， showed it was not an asteroid; it was moving too fast along a strange orbit， and left no trail of gas or debris in its wake。 There was only one conceivable explanation: the object was a piece of advanced technology created by a distant alien civilization。
 
In Extraterrestrial， Loeb takes readers inside the thrilling story of the first interstellar visitor to be spotted in our solar system。 He outlines his controversial theory and its profound implications: for science， for religion， and for the future of our species and our planet。 A mind-bending journey through the furthest reaches of science， space-time， and the human imagination， Extraterrestrial challenges readers to aim for the stars—and to think critically about what’s out there， no matter how strange it seems。
 

Download

Reviews

Monana ，

very short， but sometimes still lost his focus

Kate ，

Not a scientist， but the findings published here are super interesting， plus I like his argument about encouraging creativity and thinking outside the box in the sciences， but 1） the author is a bit out of touch 2） I felt like he wrote this book to defend his legacy and could have distilled it down to a very interesting long-form article。

Suzanne Cloud ，

I bought this Extraterrestrial: The First Sign of Intelligent Life Beyond Earth because I heard Avi Loeb on a podcast with physicist Sean Carroll and I thought， wow， finally here is someone who is really talking about contact with extra-terrestrials。 His book centers around the notably very weird Omuamua， the first known interstellar object traveling through our solar system， and his belief that it could be something sent by another species。 Loeb includes his personal biography in this book， whi I bought this Extraterrestrial: The First Sign of Intelligent Life Beyond Earth because I heard Avi Loeb on a podcast with physicist Sean Carroll and I thought， wow， finally here is someone who is really talking about contact with extra-terrestrials。 His book centers around the notably very weird Omuamua， the first known interstellar object traveling through our solar system， and his belief that it could be something sent by another species。 Loeb includes his personal biography in this book， which gives it some context on his open-mindedness and how willing he is to buck the trend of other physicists and cosmologists who think he's crazy。 Now that the cat is out of the bag with aerial film leaked to the press about our jet pilots seeing and documenting （fairly regularly it seems） demonstrable UFOs on our East Coast--see 60 minutes episode May 15， 2021--maybe， Avi Loeb isn't crazy after all， hmmm？ Good read。 Open your minds！ 。。。more

George Reichel ，

An excellent book。

Rikki ，

The account of the anomaly in question is interesting and his theory is very believable。 But it only accounts for what would make a small artical。 The rest of the book is autobiography and his own personal philosophy on the practice of science。 He continously cites Galileo and is clearly envisioning himself as just such a martyr。 He constantly hails and calls for humility throughout the entire ego-trip， too。 Tedious book。

Bea Wooding ，

credible and hopeful

Justin ，

This was an interesting read and a really compelling hypothesis。 ‘Oumuamua was an interstellar object discovered in 2017 that was highly luminous/reflective， oddly tumbling， likely flat disk-shaped， accelerating smoothly on a path from the Sun not explained by the Sun’s gravity and without any visible outgassing （which is jerky anyway）， and then decelerating。 Its origin in space-time was local standard of rest， meaning it was sitting still in interstellar space before our solar system encountere This was an interesting read and a really compelling hypothesis。 ‘Oumuamua was an interstellar object discovered in 2017 that was highly luminous/reflective， oddly tumbling， likely flat disk-shaped， accelerating smoothly on a path from the Sun not explained by the Sun’s gravity and without any visible outgassing （which is jerky anyway）， and then decelerating。 Its origin in space-time was local standard of rest， meaning it was sitting still in interstellar space before our solar system encountered it。 All of this is statistically extremely unusual。 ‘Oumuamua was observed for 11 days， and it’s painful to think what an opportunity was missed。 A second interstellar object， 2I/Borisov， was discovered in 2019， but this was a natural object with no unusual properties other than originating from outside our solar system。 I wonder if we’ll get the chance to see something like ‘Oumuamua again。 This was all a very fascinating discussion， and it’s hard to disagree that it was not an artificial object - another civilisation’s Voyager probe， presumably long lost。The discussion of the Breakthrough Starshot Initiative was also really interesting， where he demonstrated that we have the technology to produce something that would resemble ‘Oumuamua’s characteristics: a lightweight probe propelled by a thin lightsail that could be initially accelerated by a high-powered laser in Earth orbit。 It could reach 20 percent the speed of light， meaning it could reach Alpha Centauri after 20 years， and 4 years later we would receive images taken by the probe of what was in that system。 The probes would be very cheap - the space laser is the expensive component - and so we could send huge amounts of these probes to various stars。 And we have the technology to do it if we wanted to。 That was cool！ But also depressing - I can’t see it being funded， because who cares？ With the recent Hartlepool by-election in mind， I kept thinking about just how little people like those in Hartlepool would care， and so it will probably not happen in my lifetime。Similar thoughts dragged me down when Loeb talked about the search for extraterrestrial life in general， saying how its discovery would transform humanity。 I’m not convinced it would really make much of a difference to people such as those in Hartlepool。He did talk about the great filter （civilisations extinguish themselves）， giving reasons to seed terrestrial life around the galaxy。 I’m not sure this was a terribly good idea or particularly humble， as it took no account of the pre-existing life that this might be intruding upon， and the consequences that might mean。 He spends a lot of time talking about arrogance versus humility， but this seemed to me to be him straying into arrogance territory himself。 Nonetheless， the brief discussion on origins of life was quite interesting。The sections of memoir， including a whole chapter giving his lifestory， also seemed to encroach into arrogance territory， as it mostly came across as Loeb saying how brilliant he was。 It included regular criticism of the conservatism of modern science。 I get why he included it: it showed that he was capable and well-respected， and it potentially offered others inspiration to follow his path。 But I didn’t find it massively interesting， and it did feel like padding。A lot of the book felt like padding - he repeated himself over and over and over again。 It could have been a much shorter and just as interesting book。 The padding knocked a few stars off for me - it felt like an interesting magazine article stretched into a short book， without really saying much more。The other mildly irritating thing was that it was written for American audiences， and so some of the references （eg the shape of footballs） needed translation。 I assume the American audiences explain why he used so many Biblical anecdotes to illustrate his points - seemed weird in a science book。 There was also a weird， lengthy discussion on whether it would be better for the extraterrestrial civilisation to be religious or secular。 I guess that is a more pertinent debate if you live in a religious society yourself。I did feel a certain pessimism at the end though， in contrast to his optimism。 I honestly don’t think much will change if/when extraterrestrial life is found， which is kind of a depressing thought - but I stress that his conclusion was the opposite， that everything would change。 However， I do wish we’d get on with building a space programme to send probes to other star systems in my lifetime！ And I regret that we didn’t get a better image of ‘Oumuamua to see what it was。 Hopefully there will be another one， if they’re so cheap。 。。。more

Lydia ，

Intriguing to learn more about ‘Oumuamua and enjoyable to speculate。 But not enough content to fill a book， writer repeats himself a fair bit。

Timo ，

I'm not a big science nerd so theories in this book （and parts concercing writer's personal life） don't interest that much and are rather banal at times。 However the parts containing philosophical discussion about stagnated state of scientific research and dogmas are more than in point！ I'm not a big science nerd so theories in this book （and parts concercing writer's personal life） don't interest that much and are rather banal at times。 However the parts containing philosophical discussion about stagnated state of scientific research and dogmas are more than in point！ 。。。more

Joe ，

"Extraterrestrial: The First Sign of Intelligent Life Beyond Earth" is both a micro and a macro discussion of the state of astronomy today。 On the micro level， it's about Oumuamua: the unidentified interstellar object that zoomed through our solar system back in 2017。 Loeb makes a compelling case that this object is proof that intelligent life exists （you know， besides us）。 Specifically， he believes it to be a kind of "light sail" and/or piece of trash from an alien civilization。 After reading t "Extraterrestrial: The First Sign of Intelligent Life Beyond Earth" is both a micro and a macro discussion of the state of astronomy today。 On the micro level， it's about Oumuamua: the unidentified interstellar object that zoomed through our solar system back in 2017。 Loeb makes a compelling case that this object is proof that intelligent life exists （you know， besides us）。 Specifically， he believes it to be a kind of "light sail" and/or piece of trash from an alien civilization。 After reading this book， I'm inclined to believe him。 None of the other "official" explanations make any sense。On the macro level， Loeb discusses his frustrations with the current state of astronomy。 No "reputable" scientist wants to risk their career talking about aliens but if we're not searching for aliens with our astronomers， what the hell are we doing？ That should be goal number one！I've always had a soft spot for the high risk， high reward type of missions Loeb discusses here and I'm 100% on board。 Imagine if we put just 1/10th of our military budget towards reaching Alpha Centauri？ It would be thrilling and who knows what we would accomplish！ 。。。more

Sookie ，

I went into this quite open， knowing the subject matter a little before hand。 There have been a lot of videos made on this event - from physicists to alien enthusiasts， from religious fanatics to conspiracy theorists。 Whole Loeb takes time in explaining everything that happened surrounding the asteroid， the deferential unfortunately moved more towards history of science， anecdotes than exploration of theories or Oumuamua itself。 There is a lot of info out there but credit must be given to Loeb f I went into this quite open， knowing the subject matter a little before hand。 There have been a lot of videos made on this event - from physicists to alien enthusiasts， from religious fanatics to conspiracy theorists。 Whole Loeb takes time in explaining everything that happened surrounding the asteroid， the deferential unfortunately moved more towards history of science， anecdotes than exploration of theories or Oumuamua itself。 There is a lot of info out there but credit must be given to Loeb for somewhat collating it together and putting it all together in a scientific context。 Thank you to Netgalley and Houghton Mifflin Harcourt for providing me with a free copy of this e-book in exchange for an honest review。 。。。more

Cindi ，

It's almost as much of a memoir as a treatsie on a mysterious space object。 But still， great book！ It's almost as much of a memoir as a treatsie on a mysterious space object。 But still， great book！ 。。。more

Edward Shuman ，

Very enlighteningDr。 Loeb has written a very enlightened book on the topic from a scientific view point。 After hearing him on the Glenn Beck pod cast， I had to read the book。

Keith Akers ，

Our first contact with an extraterrestrial civilization is through a piece of their space junk。 This actually makes sense when you think about it; if an alien civilization where to be monitoring our planet， they'd likely first stumble on commercials rather than on some communication from scientists。 This book is convincing to me， and is divided into roughly three parts。 The first part is autobiographical， and seems directed at convincing the reader that yes， he's a real scientist， he's not just Our first contact with an extraterrestrial civilization is through a piece of their space junk。 This actually makes sense when you think about it; if an alien civilization where to be monitoring our planet， they'd likely first stumble on commercials rather than on some communication from scientists。 This book is convincing to me， and is divided into roughly three parts。 The first part is autobiographical， and seems directed at convincing the reader that yes， he's a real scientist， he's not just some crazy guy with a good conspiracy theory。 The second part is the actual science， descriptions of Oumuamua （the object in question）， and reasons why Oumuamua is quite unusual and why certain of its properties aren't explicable in terms of this being a naturally formed object。 The third part is more philosophical musings on what taking Oumuamua seriously would mean。 I was surprised that the scientific community doesn't take SETI seriously。 I can understand why they wouldn't necessarily buy Loeb's ideas， but it's harder to understand why the sub-community of astronomers actively monitoring this subject area wouldn't be taken seriously。 The book doesn't really build to an exciting climax， it just sort of trails off。 But that， I think， is the way science works when there is something we don't really fully understand out there。 。。。more

Marc Mohan ，

The author goes on and on about how humans need to be more humble regarding their place in the universe vis a vis the existence of intelligent life elsewhere。 This is completely true， but Loeb somehow manages to sound really quite arrogant while making the point。 The ultimate humblebrag， perhaps。 Despite its elitist anti-elitism， though， it makes a compelling case for leaving open the hypothesis that the first interstellar object ever observed moving through out solar system was in fact an objec The author goes on and on about how humans need to be more humble regarding their place in the universe vis a vis the existence of intelligent life elsewhere。 This is completely true， but Loeb somehow manages to sound really quite arrogant while making the point。 The ultimate humblebrag， perhaps。 Despite its elitist anti-elitism， though， it makes a compelling case for leaving open the hypothesis that the first interstellar object ever observed moving through out solar system was in fact an object that had been designed by an extraterrestrial civilization。 Maybe this is the point where a "real" scientist would hop in an finger-wag me about some of the theories and equivalencies Loeb relies upon， and if so I reserve the right to be more skeptical。 But the book also works as a cri de coeur towards the scientific community in general， to be more willing to follow data towards conclusions that may contradict long-held assumptions about the nature of reality。 And with regard to that， it's hard to argue with him。 。。。more

Dahlgren General Library ，

DA100000031225

Jim Sarjeant ，

Very interesting read about the odds of Earthlings being extraterrestrial， Venus ‘s phosphine findings proving life exists there and if Omuamua was extraterrestrial。 Will we discover life outside Earth in 20 years， say？And what about the planned light sail to another sun that has a planet with earth like temps achievable within 20 years。Avi Loeb is an astronomer to be followed for his vision and courage。

John Vanderslice ，

This is a superb and compelling read。 When the Oumuamua story， and the artist depiction of what it was supposed to look like， and word of Loeb's thesis that it was of alien origin and constructed by an alien intelligence， hit the media in a big way a couple of years ago， I was kind of indifferent。 Based on the artist depiction， I could only conclude that Oumuamua was nothing more than a weird looking space rock that found its way into our solar system。 Why did it have to be artificially construc This is a superb and compelling read。 When the Oumuamua story， and the artist depiction of what it was supposed to look like， and word of Loeb's thesis that it was of alien origin and constructed by an alien intelligence， hit the media in a big way a couple of years ago， I was kind of indifferent。 Based on the artist depiction， I could only conclude that Oumuamua was nothing more than a weird looking space rock that found its way into our solar system。 Why did it have to be artificially constructed？ Well 。 。 。 Loeb tells you。 First， the artist depiction is totally wrong。 It doesn't fit the physical properties of the object as suggested by its movements and light reflection。 In fact， when one actually looks at the details of the object's movements they do not fit any of the usual behaviors of rocks， comets， etc。 It becomes ludicrous to try to explain Oumuamua by those conventional methods。 In fact， the most reasonable explanation--based on the facts--is that it is very flat， round， metal object。 Loeb makes a superb case for believing that if scientists did not run up against the fact that they automatically scorn， or feel they must， any notion of extraterrestrial life， there would be widespread agreement on the shape and nature of Oumuamua。 Or if it were possible to assume that humanity had made the craft， scientists were easily accept that it Oumuamua was flat， round， and metal。 That is， an artificially created object。 But there's the rub。 And this takes up most of the space in Loeb's carefully reasoned and loving book: the fact that the scientific community is fundamentally very conservative， and when it comes to any notion of extraterrestrial life， as conservative as in the famously short-sighted days of Galileo。 Just as in Galileo's time， most scientists simply refuse out of hand to accept certain conclusions--in fact mock those conclusions--making their disciplines an echo chamber， which affects how young scientists think and act。 And of course this affects things like what projects get funded and what result in getting someone tenure。 Unlike the radical-left， crazily chancy science of the political right's imagination， science turns out to be the most conservative， and sometimes stifling， industry of all。 The saddest aspect of this is that it sometimes ends up stifling truth and setting humanity back decades in its development。 This is a very valuable book。 Loeb is no wild-eyed nut， and he clearly loves his calling in life， and he is extremely accomplished at it。 Based on the facts， the case he makes is fairly indisputable。 But， as we all know， conclusions in our current culture are so often based not on facts。 。 。 。 。。。more

Eddie Arafat ，

I bought this book because I wanted to hear about the extraterrestrial theory behind Oumuamua。 The author does mention many things that made the space object so unique from other comets observed。 However， most of it is covered in the first few chapters。 After that we get lots of biographical stories about the author， his career， his family， the scientific community in general， some of his achievements， etc。 So this book is like half about the possibility of Oumuamua being a light sail and half a I bought this book because I wanted to hear about the extraterrestrial theory behind Oumuamua。 The author does mention many things that made the space object so unique from other comets observed。 However， most of it is covered in the first few chapters。 After that we get lots of biographical stories about the author， his career， his family， the scientific community in general， some of his achievements， etc。 So this book is like half about the possibility of Oumuamua being a light sail and half about the author's life and just about the scientific process in general。 I have to admit I feel a bit misled。 。。。more

Jamie Stott ，

Excellent， even if he's wrong he raises some brilliant points and excellent thinking。 Well worth the time。 Excellent， even if he's wrong he raises some brilliant points and excellent thinking。 Well worth the time。 。。。more

Laura K | luonnonlukija ，

Olipa mielenkiintoinen！

Maureen Weiner ，

This was a great book！ I love reading authors who admit that their theories are indeed theories - ideas that need more data， problems that have yet to be solved， reminders to continue searching AND remain humble at the same time。

John ，

If you get past the name dropping and the ego boosting achievements that the author mentions at the start of the book。。。If you make it past the first half of the book that reads like pure drivel。。。You'll get to the only chapter I found interesting: Chapter 7 : Learning from Children。The rest of the book from that point onwards is worth a read。。。 not because it's mainstream science， but because:a。 If there ever is a shred of evidence in the future that what the author claims may be true， he gets If you get past the name dropping and the ego boosting achievements that the author mentions at the start of the book。。。If you make it past the first half of the book that reads like pure drivel。。。You'll get to the only chapter I found interesting: Chapter 7 : Learning from Children。The rest of the book from that point onwards is worth a read。。。 not because it's mainstream science， but because:a。 If there ever is a shred of evidence in the future that what the author claims may be true， he gets bragging rights forever， orb。 If this [as the author claims] is a hypothesis at this point， it's no different from any hypotheses that his predecessors have claimed about other discoveries [I'm look at you， black hole theorists！]#TLDR: Skip the first half， read Chapter 7， skim the second half。 。。。more

Mynah ，

Some inteligent life out there built this thing to do。。。 what？ Many leaps of logic and faith here。 Interesting what he's done with the facts， but I'm not buying it。 Some inteligent life out there built this thing to do。。。 what？ Many leaps of logic and faith here。 Interesting what he's done with the facts， but I'm not buying it。 。。。more

Anthony O'Connor ，

GloriousOk the text itself is a bit scattered。 The authors nostalgic biographical fragments and ruminations on the philosophy of science and its value are superfluous and irrelevant。 His invocations of the standard mythology of Galileo versus the Church are simplistic and substantially incorrect。 Galileo caved。 But That’s ok。 Who wouldn’t。 It was that or death by torture by the holy catholic apostolic church。 Pious self serving power mongers。 Then and now。 BUT this is a Superb book anyway。 The a GloriousOk the text itself is a bit scattered。 The authors nostalgic biographical fragments and ruminations on the philosophy of science and its value are superfluous and irrelevant。 His invocations of the standard mythology of Galileo versus the Church are simplistic and substantially incorrect。 Galileo caved。 But That’s ok。 Who wouldn’t。 It was that or death by torture by the holy catholic apostolic church。 Pious self serving power mongers。 Then and now。 BUT this is a Superb book anyway。 The author makes the case for our first encounter with an extraterrestrial artifact and outlines related research efforts。 Surely this is of the utmost importance and just excruciatingly fascinating in itself。 And yet arrogantly dismissed by mainstream dogma。 SO also of great interest is his deeply honest evisceration of the status quo。 As a Harvard professor he can afford to do this。 A clear account of the The power mongering dogmatism and dishonesty of the mainstream。 Some things never change。 And The chillingly timid conformance and compliance by junior members eager to fit in and find a place。 There is no one in this world more timid， more conforming， and more conservative than a freshly minted post-doc in physics。 And none so desperately certain that they are now in the elite and determined to stay that way。 And so arrogantly disdainful of any unapproved point of view。 We’ve all met them， they are so pathetic。 。。。more

Ricky ，

Avid Loeb makes a good scientific case for the hypothesis that the strange object tracked in our solar system came from an extraterrestrials source。 I found the book interesting and easy to understand。 I liked the fact that he could back up his hypothesis with hard facts that the scientific world couldn't dispute。 Like he said once you mention extraterrestrial civilisations the scientific mainstream start to get jumpy and wants to distance itself， even with hard facts they can't dispute。 If you' Avid Loeb makes a good scientific case for the hypothesis that the strange object tracked in our solar system came from an extraterrestrials source。 I found the book interesting and easy to understand。 I liked the fact that he could back up his hypothesis with hard facts that the scientific world couldn't dispute。 Like he said once you mention extraterrestrial civilisations the scientific mainstream start to get jumpy and wants to distance itself， even with hard facts they can't dispute。 If you're open and interested in finding answered from the facts presented in this book and you look at the data in a level headed way， then the object discovered points very much in favour of Avi Loeb's theory that the object tracked was indeed from an extraterrestrial source。 That's the only obvious conclusion from the data and scientific facts recorded and presented。 。。。more

Jerry ，

While Loeb's concepts regarding extraterrestrial life and the importance of an open mind towards its likelihood are compelling， the presentation might have been better addressed in a scientific paper or opinion piece rather than a book。 Much of the first half of the book is spent name dropping （the word "Harvard" appears much more frequently than "extraterrestrial"）。 The story around what lead to discoveries is very dry。 More depth regarding the personalities involved might have given it some in While Loeb's concepts regarding extraterrestrial life and the importance of an open mind towards its likelihood are compelling， the presentation might have been better addressed in a scientific paper or opinion piece rather than a book。 Much of the first half of the book is spent name dropping （the word "Harvard" appears much more frequently than "extraterrestrial"）。 The story around what lead to discoveries is very dry。 More depth regarding the personalities involved might have given it some interesting flavor。The reading by Petkoff felt overly dramatic， which may have been what was intended but didn't make for a comfortable listen。 This is one of the few audiobooks I chose to listen to at higher than normal speed setting。All in all， a rating of 3 seems fair。 Worth a listen but not what I would consider a better than average book。 。。。more

Mark Bates ，

Intersting， a little pretentious and rambling。

Clayton Chase ，

Believing we are the only humans in the universe is the height of hubris。 Avi exposes compelling evidence of extraterrestrial life， but perhaps more importantly， the persistent flaws in a scientific community and mindset that are giant obstacles to such a discovery。

Yun ，

The Hawaiian word 'oumuamua 。 。 。 is loosely translated as "scout。" In its announcement of the object's official designation， the [IAU] defined 'oumuamua slightly differently， as "a messenger from afar arriving first。" Either way， the name clearly implies that the object was the first of others to come。 Holy cow， I'm not afraid to say this freaked me out a bit！ Could evidence of intelligent life have really whizzed by our Sun a few years ago and we were none the wiser？In the Fall of 2017， an obje The Hawaiian word 'oumuamua 。 。 。 is loosely translated as "scout。" In its announcement of the object's official designation， the [IAU] defined 'oumuamua slightly differently， as "a messenger from afar arriving first。" Either way， the name clearly implies that the object was the first of others to come。 Holy cow， I'm not afraid to say this freaked me out a bit！ Could evidence of intelligent life have really whizzed by our Sun a few years ago and we were none the wiser？In the Fall of 2017， an object raced through our solar system and quickly left。 It was traveling so fast that it could only have come from afar。 Extraterrestrial: The First Sign of Intelligent Life Beyond Earth lays out all the data we have regarding this interstellar visitor， and makes a compelling case for why all the facts and anomalies point to this being a piece of advanced alien technology。This completely blew my mind！ It was utterly fascinating （and also kind of freaky） to follow along as each piece of data was presented and then matched up with the alien technology theory。 And it seems academically sound and wholly plausible。 So why the low rating？ Well， that discussion is just a very small part of this book。 In the thirteen chapters， only chapters 1 and 3 were totally dedicated to 'Oumuamua。 And here's the crux of the issue: all the information， data， and facts collected regarding 'Oumuamua can be squeezed into a long article。 So to make a book out of it， the author really had to expand upon the topic。 It doesn't help that his expansions are heavily pedantic， often turning concepts the layman can understand into complex technical jargon that only those in the field could wade through。To further expand and turn this into the length of a book， the author filled the majority of this book with information about his family and how he grew up， his professional career， summaries of pretty much every paper he has written that is even remotely relevant， every person he has worked with， his personal views on philosophy and science， and numerous rants against the scientific community's inability to consider new ideas。It feels like the author decided to use this book as his personal soapbox and as a chance to show off how accomplished he is。 Which is silly because I already believe he is someone worth listening to and his theory has plausibility， hence why I'm reading this。If you're interested in 'Oumuamua， I obviously don't recommend this book。 Instead you can just look up some articles or videos， get the gist of it， walk away slightly freaked out like I am， and save yourself several hours。 。。。more

Reference

google book https://www.google.com/search?tbm=bks&q=Extraterrestre: La humanidad ante el primer signo de vida inteligente más allá de la Tierra

hathitrust digital library https://babel.hathitrust.org/cgi/ls?q1=Extraterrestre: La humanidad ante el primer signo de vida inteligente más allá de la Tierra&field1=ocr&a=srchls&ft=ft&lmt=ft

The British Library https://bll01.primo.exlibrisgroup.com/discovery/search?query=any,contains,Extraterrestre: La humanidad ante el primer signo de vida inteligente más allá de la Tierra&tab=LibraryCatalog&search_scope=Not_BL_Suppress&vid=44BL_INST:BLL01&lang=en&offset=0