Downloading consciousness

If we could download our consciousness in a computer or a robot, we could go on living indefinitely inside the hardware and thus achieve immortality. This is what some futurists and supporters of transhumanism hold. But is there any chance that this will come true?

If this were possible, we could also keep backup copies. Thus, in the event of an accident, the dead person could be retrieved and put back into operation with minimal memory loss. As usual, science fiction arrived there first, as in Cory Doctorow's novel Down and out in the Magic Kingdom.

Will cyborgs be immortal?

Neil Harbisson
File licensed under Creative Commons

The third procedure that has been proposed to make us immortal is the following: as our organs deteriorate, we could replace them with artificial organs, thus becoming a cyborg, a being intermediate between man and machine. The process could be repeated as many times as needed, potentially making us immortal.

Just now, this line of research is not very much advanced.

Will robots help us to be immortal?

The second method that, according to optimists, will help us achieve immortality, is based on the following idea:

We will soon be able to design tiny robots that, introduced into our blood, will attack and destroy every pathogenic microorganism, as well every cancer cell, leaving the normal cells of the body intact. When all diseases disappear, we will automatically be immortal.

Will we be immortal by increasing our life expectancy?

Pieter van Lint - Allegory of immortality

This method is based on the following idea: if we could manage to increase our life expectancy by more than one year per year, we would automatically be immortal. Mathematically, this idea is correct. But is there any chance that it will happen in practice?

One problem is that the increase in life expectancy is slowing down, and has even reversed.

First, we must clear up a misunderstanding. Two completely independent concepts should not be confused:

Four ways to achieve immortality

Herodotus

As I have explained in previous posts in this blog, some people believe that we are about to achieve immortality. Of course, depending on the way to do it, it might not be applicable to everyone, because it would be very expensive. Perhaps it would just be feasible for a few enormously wealthy people. Or maybe it could be done in a more democratic way, so that everybody would be immortal. Many journalists, politicians, tycoons, philosophers, futurologists, and even ordinary people are convinced that sooner or later all of us, or at least some of us, will be immortal.

This is not a new hope; it comes from deep in the past. One of the oldest known masterpieces of literature, the Epic of Gilgamesh, written 4,000 to 4,500 years ago, deals with the quest for immortality. We also have the legend of the fountain of youth, which would give immortality to those who drink from its waters. According to Herodotus, it would be located in Ethiopia, although some say that Ponce de León searched for it in vain in Florida.

Predictions by Arthur C. Clarke until 2020 (and beyond)

Arthur C. Clarke

In a previous post I pointed out that short-term predictions are dangerous, because the expected date does not take long to arrive, and the "prophet" runs the risk that someone (like me) takes a note of the predictions and checks if they really took place.

In this post I am going to apply the same principle to long-term forecasts, where the effect is even more dramatic. Of course, it is more difficult that those predictions are remembered, but there is always someone (like me) who keeps press clippings from 1963 and can check if they were fulfilled.

In praise of the Trivium

Dorothy L. Sayers

I have often said that education in Spain has worsened over the last fifty years. Almost whenever the government has changed, a new education law has been promulgated that, without exception, has always been worse than the previous one. The duration of learning has been lengthened. In 1963, I entered the university when I had just turned 17. Today nobody arrives there without having turned 18. Sometimes it is argued that children must learn more and need more time. It may be true, but do they really know more when they get to the university?

The answer to this question is undoubtedly negative. When they get to the university, the level of the students is low, they are not able to reason and sometimes they don’t even understand what they read. They are getting easier to manipulate. Perhaps this is what is intended.

Is there life in the solar system beyond Earth?

At the end of 1981, Editorial Mezquita (a subsidiary of Editorial Alhambra) published my book entitled La Vida en Otros Mundos (Life in Other Worlds), one of whose chapters addressed the question in the title of this post. When the book was discontinued, it was again published in 1992 by MacGraw Hill of Spain, in an updated version, in a collection dedicated to science popularization, which kept my book in its catalog for around a decade. It is currently out of print.

Since then, things haven't changed much. Subsequent research has added a couple of satellites that weren’t considered in the 80s and the 90s to the list of bodies where it might be possible to find microscopic life. Of course, nobody expects to find intelligent life, or multicellular animals and plants, in any body in the solar system outside the Earth, although in science-fiction literature those things happen.

Quantum Teleportation

Anton Zeilinger

This year the Nobel Prize in Physics has been awarded to John Clauser, Alain Aspect and Anton Zeilinger, for their pioneering work in quantum communications.

• Clauser (with Stuart Freedman, who died in 2012) carried out the first experiment with entangled photons in 1972, which proved that the direction of Bell's inequality favors the Copenhagen interpretation of quantum mechanics, thus solving the EPR paradox (acronym for Einstein-Podolsky-Rosen), which tried to contradict this interpretation. This experiment was not complete, so others were carried out later, under increasingly strict conditions.

Information on the Internet is ephemeral

Manuel Calvo Hernando

I'll start with a personal anecdote:

• At the end of the 1980s, I became a member of the Spanish Association of Scientific Journalism, which had been created in the early 1970s by the famous Spanish science popularizer Manuel Calvo Hernando, whose articles in a major newspaper I had been following since the 1960s. By then, I was writing many science popularization articles, which were published by another Spanish newspaper, La Vanguardia. Calvo Hernando was delighted to receive me at the Association.
• Around the year 2000, this association changed its name to the Spanish Association for Scientific Communication (AECC in Spanish). These initials happened to be the same as those of the Spanish Association Against Cancer. Therefore, the acronym has recently been changed to AEC2.

Some predictions by Ray Kurzweil for 2020

Ray Kurzweil

Short-term predictions are dangerous, because the expected date does not take long to arrive, and the "prophet" runs the risk that someone (like me) takes a note of the predictions and checks if they really took place.

On December 13, 2009, the New York Daily News published an article with the following headline:

Top futurist, Ray Kurzweil, predicts how technology will change humanity by 2020

The hidden premise

Alvin Plantinga

In previous posts in this blog I have mentioned that atheists sometimes try to justify their beliefs by using hidden premises in their reasoning, the most important of which is this:

God does not exist

At the end of their line of thought, they usually conclude that God does not exist, or some equivalent statement. As the starting premise is hidden, they probably don’t notice that they have incurred in circularity, one of the best-known fallacies since ancient times, which tries to prove the truth of a statement, by assuming from the beginning that the same statement is true.

In the introduction to his Contribution to the Critique of Hegel’s Philosophy of Right, Karl Marx writes this:

Klara and the Sun

Kazuo Ishiguro

Those who are considered great writers don’t usually dedicate part of their efforts to science fiction. This genre has traditionally been considered second-rate, despite the fact that some prestigious authors have occasionally engaged on it. In this context, the most cited work is Brave New World, by Aldous Huxley (1932), a book I have talked about in previous posts in this blog.

But there has been a recent foray into this genre, by no less than a Nobel Prize winner for Literature. Kazuo Ishiguro, who writes in English and received the award in 2017, is well known for works such as The Remains of the Day, or An Artist of the Floating World, plus his science-fiction novel, Never Let Me Go, a dystopia along the same lines as Corinna Turner's I am Margaret, which I mentioned in my post on dystopias in this blog. Now, in 2021, he has published a science fiction novel that touches on the theme of strong artificial intelligence.

Hyperluminal speed in real life

Cherenkov radiation

We know that the special theory of relativity states that the speed of a body with rest mass greater than zero must be less than the speed of light in a vacuum, i.e., about 300,000 km/second. However, sometimes examples are given that seem to indicate, at first glance, that this limit can be transgressed. Let's look at them:

Does the Moon influence people?

Astrologers have been answering this question in the affirmative since time immemorial. It’s true that astrology has been discredited since a few centuries ago, to the point that another name had to be found for the science dedicated to the study of the stars (astronomy = laws of the stars). Despite which, in this supposedly scientific age, the mainstream media dedicate significant space to horoscopes and other astrological products.

Sometimes the influence of the moon has been confirmed. Since ancient times it was observed that the tides are related to the position of the moon in the sky, although it was not known how this influence could take place. To support the theory of Copernicus against that of Ptolemy, Galileo formulated a theory, according to which the tides are not due to the attraction of the moon, but to the translational movement of the Earth around the sun. In this case Galileo was wrong, because the influence of the moon is real, although it was not explained until Isaac Newton formulated the theory of universal gravitation.

Time travel and matter transfer

C.S. Lewis

Apart from the Chronicles of Narnia, C.S. Lewis wrote a science fiction trilogy and left an unfinished fourth novel, The Dark Tower, which was published as-is after his death. In this novel, Lewis offers an argument against the possibility of time travel, not commonly advanced in this context. Usual arguments are a version of the Fermi paradox, or the enumeration of the paradoxes that could occur if it were possible to travel to the past, and in some cases also to the future.

The argument offered by C.S. Lewis consists of two parts:

Andy Weir and the Hail Mary Project

Andy Weir

Andy Weir became famous with his 2011 sci-fi novel The Martian, in which an astronaut is mistakenly abandoned on Mars when the third expedition must be hastily canceled because of a violent dust storm. The novel was the basis for a film, which bears the same title, and which made its author famous.

Weir is not a prolific writer. In 2021, his third novel, Project Hail Mary, was published. In my opinion, this is one of the seven best science fiction novels of all time. My other six favorite works in this genre can be seen here.

Project Hail Mary is a hard science fiction novel about space adventures typical of the genre. It deals with interstellar travel at relativistic speeds, encounter with extraterrestrial intelligences, or the invasion of the solar system by extraterrestrial life forms that threaten our survival. All this is integrated in a coherent way.

Science and hate for religion: a personal anecdote

John McCarthy

Since 1995, Internet has become an almost indispensable tool for many people. Our society is increasingly dependent on the global data network, which means that we are increasingly vulnerable. A solar flare, a large meteorite, an overload of energy networks, a major war, can endanger our social structure, making it impossible to use Internet.

In the late 1980s, Internet was just a fledgling network linking together private companies, whatever their hardware and software. In fact, it was one among many networks competing for the new ecological-social niche. One of the most important of these networks was BITNET, which linked all the universities in North America using IBM computers. Later, a parallel network was created in Europe, called EARN, which was soon connected to BITNET.

Science was never a danger for my Catholicism - Part II

Interview with Manuel Alfonseca. Originally published in Spanish in La NuevaRazón

Questioner: Carlos Sordo de la Rubiera

II Part

Q: In your article “Faith in God in the light of science” you say this: "During the 18th and 19th centuries, believers gave ground as new scientific advances forced them to accept that the Earth is not the center of universe and that the human body is the result of a long and complex biological evolution”. But, continuing with said article "as a consequence of the latest advances in Cosmology and the Physico-Chemical sciences, and for the first time in several centuries, atheism has now got on the defensive." Let's stop at this last point. If atheists go on the defensive, it is because they consider that their atheism deserves to be defended. If, as you also affirm, the human being has a wish for immortality and a longing for infinity, and atheism gives a negative answer to that wish and that longing, how is it possible that a person may decide to take an atheist position?

Science was never a danger for my Catholicism - Part I

Interview with Manuel Alfonseca. Originally published in Spanish in La NuevaRazón

Questioner: Carlos Sordo de la Rubiera

I Part

Q: Most scientists are atheists. Myth or Reality?

A: I think this is not true. Since God is obviously not an object of study by science, many scientists, relying solely on science, hold that the correct position is agnosticism. But there are other ways, apart from science, that can make us know something. In general, there are three forms of knowledge: authority, experience, and reasoning. Scientific research is just one type of reasoning; apart from it, we also have, for instance, philosophical or artistic reasoning.

The abolition of man

C.S. Lewis

In 1943, C.S. Lewis wrote a book with the same title as this post. In that year, the second world war was in full swing, but the book is not about the war, but about more fundamental questions, such as the moral degradation of man, which was then quite advanced and is worse today. This is how Lewis explains this degradation:

Let us regard all ideas of what we ought to do simply as an interesting psychological survival: let us step right out of all that and start doing what we like. Let us decide for ourselves what man is to be and make him into that: not on any ground of imagined value, but because we want him to be such. Having mastered our environment, let us now master ourselves and choose our own destiny.

Utopias and Dystopias

Utopias, the descriptions of fictitious perfect societies, owe their name to Thomas More's Utopia (1516), a title of Greek origin that literally means nowhere. Before and after More's work there have been many other utopias, each one to the liking of its author, for the question of the perfect society gives a lot of play to the imagination. Examples include Plato's Republic, Tomasso Campanella's The City of the Sun (1602), Francis Bacon's New Atlantis (1627), Bulwer Lytton's The Coming Race (1871), Edward Bellamy's Looking Backward (1888, see this post), William Morris's News from Nowhere (1890), James Hilton's Lost Horizon (1933), or Aldous Huxley's Island (1962).

A Canticle for Leibowitz

This novel, one of my favorites in the science-fiction genre, belongs to the catastrophic subgenre, also called post-apocalyptic. This is its summarized argument:

An atomic war has destroyed our civilization. After the catastrophe, the surviving masses hate science and books, considering them responsible for the tragedy. In the same way as after the fall of the Roman Empire, the Catholic Church collects the remains of knowledge and preserve them for posterity, so they can be used by a new civilization, capable of understanding them, if one day it would arise. But when this happens, history repeats and man self-destructs again.

Science or imagination?

A large part of the "scientific" research currently being developed, rather than being science, is just an exercise of the imagination of "scientists." It seems that we must consider as scientists all those who do mathematical speculations that have little or nothing to do with reality. And naturally, everything a scientist does is “science”. At least, scientific journals and high-profile media consider it as such.

Do black holes have hair?

Black holes are strange objects. They are accumulations of extremely compact matter, which exerts such huge gravity that at less than a certain distance (the event horizon) nothing can escape their attraction, not even light. Hence their name.

The existence of black holes had been predicted in the 18th century by the English geologist John Michell and the French astronomer Laplace. At that time nobody paid attention, but from 1915, when Einstein formulated the theory of General Relativity, the interest in these mysterious objects grew. It was soon concluded that when a massive star exhausted its ability to produce nuclear fusion reactions, no force of nature would be able to overcome the gravitational pull of the remaining matter, resulting in a black hole. But for a long time there were doubts about their real existence, for the theory seemed to predict that the matter located inside a black hole would occupy a zero volume and therefore would have an infinite density. As physicists usually suspect that infinity is a mathematical concept that cannot happen in real life, there were two possibilities: either black holes do not exist, or Einstein's theory would have to be modified so that they wouldn’t have an infinite density.

The most surprising scientific failures

Lord Kelvin

The magazine Science News has published an article entitled Here are the 10 ten times scientific imagination failed, either because it fell short, or because it went too far, with respect to what it was logical to imagine. The study begins by quoting Albert Einstein:

Imagination is more important than knowledge... Imagination embraces the entire world, stimulating progress.

Tom Siegfried, author of the article, adds:

And yet while sometimes spectacularly successful, imagination has also frequently failed in ways that retard the revealing of nature’s secrets. Some minds, it seems, are simply incapable of imagining that there’s more to reality than what they already know.

Then he specifies one by one the 10 cases where, according to him, the imagination of scientists fell short or went too far. This is the list, from most to least important (according to Siegfried):

Solar energy and thermal pollution

A previous post in this blog stated that if 100% of the energy used by man came from solar energy, the Earth would warm up, and although air pollution and the greenhouse effect would decrease, there would still be thermal pollution. Can we give figures? By how much would the Earth's temperature rise in that case?

According to various sources ([1] and [2]), world power consumption by humans is currently about 18.5 Terawatts (18.5 trillion watts). To find the energy consumed during a given period of time, we should just multiply this figure by the given time. For example, the total energy expenditure during a non-leap year, expressed in Terawatt-hours, will be found by multiplying 18.5 by 365 and by 24 (the number of hours in a year), which is equal to about 162,000 Terawatts-hour.

Compatible, incompatible, possible, impossible

I wish to clarify the four concepts of the title, which are sometimes confused when talking about physical theories and their application:

• An event (real or imagined) can be compatible with a theory. In this case, if the event were real, it would not pose any problem for the theory, which admits in principle the possibility of that event taking place.

The recovery of extinct species

Since genetic engineering began, in the last quarter of the 20th century, the idea arose of the possible recovery of extinct species. In 1990, Michael Crichton published his famous novel Jurassic Park, which is based on the practical realization of this idea to reconstruct various species of dinosaurs and set up with them a very special zoo. I talked about this novel in this previous post, and in this one.

Matter and antimatter. Why are we here?

The matter making the solar system, the Earth, all living beings and ourselves, is made up almost entirely of atoms which, in turn, are based on three elementary particles: protons, neutrons and electrons. For each of these particles, as well as for many others, not usually part of atoms, there is an antiparticle. Therefore, there could be antimatter antiatoms, made of antiprotons, antineutrons, and antielectrons (positrons).

An interesting property of matter and antimatter is that they cannot be together. As soon as they come into contact, they completely disintegrate, transforming into energy. Everything suggests that our galaxy (the Milky Way) is made up almost exclusively of matter. There is also some antimatter, in the form of antiparticle clouds, outside the galaxy, close to it and attracted by its gravity, but in such a small quantity, compared to the mass of the galaxy, that for practical purposes it can be ignored. It has also been said that there could be some (but very few) anti-stars.

October the first is too late

Fred Hoyle was one of the great scientists of the 20th century, as well as one of the most controversial, due to the eccentric theories he defended. His most important scientific discovery had to do with the nucleosynthesis of elements in stars, heavier than hydrogen and helium, which are the simplest and lightest in existence. In particular, from his theory on the formation of carbon atoms, Hoyle deduced an early version of the fine-tuning problem, which made him go from atheism to a vaguely theistic position, as can be seen in this paragraph from his article The universe: past and present reflections (Engineering & Science, 1981):

Would you not say to yourself… "Some super-calculating intellect must have designed the properties of the carbon atom, otherwise the chance of my finding such an atom through the blind forces of nature would be utterly minuscule... A common sense interpretation of the facts suggests that a superintellect has monkeyed with physics, as well as with chemistry and biology, and that there are no blind forces worth speaking about in nature. The numbers one calculates from the facts seem to me so overwhelming as to put this conclusion almost beyond question."

Masking against COVID-19, yes or no?

Some governments are using the mandatory or voluntary use of masks for political gain, for there are many people who do not like them, and the rulers think that lifting the obligation can give them votes. Some people deny that masking does prevent contagion, despite the fact that the use of masks to prevent the transmission of a respiratory disease is common sense. Is there any scientific study that clarifies the situation?

Is solar energy clean?

For decades we have been sold the idea that when we fully harness solar energy, all our problems of getting cheap and abundant energy, air pollution, and global warming will be solved.

For decades I have been warning that this optimistic approach is not true. If we were able to completely replace energy from fossil fuels (coal, oil and natural gas) by solar energy, some of our problems will not go away, they will just take longer to become unsustainable, especially the problem of global warming.

Why do I think this? Because the Earth receives a certain amount of solar energy. A part is used by plants to carry out the chlorophyll function, which transforms inorganic matter into organic matter, thus making life possible for all animals, including us, humans. Another part heats the oceans and the continents, allowing the Earth to maintain an almost constant temperature, despite the heat losses it suffers every day from the side opposite the sun. Finally, another part of the solar energy is reflected or diverted, in the atmosphere or on the surface, and is lost in outer space.

Superluminal interstellar travel

James H. Schmitz

The human imagination knows no limits. Einstein can tell us that the speed of light sets an insurmountable limit for objects with mass, but deep down we don't believe it. There has to be a way to break that limit! Otherwise, how could we reach the stars during the short span of our lives, return to Earth and tell here what we have seen?

People in our time, especially our civilization, are determined that we must get everything we want. I want to be immortal, so I must be; if I can't, at least my children or my grandchildren. (We don’t usually go beyond our grandchildren…) I want to travel to the center of the galaxy; if I can't, someone will. I want to do whatever I want with my life, so I will… no matter what!

Traveling at the speed of light

Image of
"2001, a Space Odyssey"

Actually, the title of this post is wrong. Traveling at the speed of light is impossible, because it would take infinite energy to accelerate to that speed a body with rest mass greater than zero. What I am going to talk about here is travel at relativistic speeds (close to the speed of light), which means more than 10% of the speed of light (i.e. 30,000 kilometer per second).

Interstellar travel in suspended animation

Most of the problems mentioned at the end of the previous post would disappear if the generational journey were combined with another scientific advance that does not seem, at first glance, impossible: the conservation of human beings in a state of latent life for very long periods of time. This state, which resembles what many living beings do when environmental conditions are unfavorable, is called hibernation when it is a response to cold, and aestivation when it is used as a defense against heat and dry seasons.

Under the current conditions of science, human hibernation is not feasible. It is true that it is possible to reduce the vital rhythm through the application of low temperatures, a technique that is being used in surgery to carry out complex or delicate operations, but the total suspension of vital activities is always transitory and limited to a short period of time, usually measured in hours.

Generational interstellar travel

In a subset of science fiction novels and stories, the journey to the stars is longer than a human lifetime. The space vehicles are huge, as they must be to house many cosmonauts during thousands of years. The speeds of these spacecraft are not very high, on the order of a few million kilometers per day. At that rate it takes thousands of years to cross the interstellar chasms.

The cosmonauts who reach the end of the journey are not the same ones who started: hundreds or even thousands of generations have passed their entire lives aboard a spaceship and don’t know the Sun, or life in the open air. The vehicle where they travel is a small planet: a closed entity, in perfect ecological balance. Nothing is wasted. Wastes from normal activity are recycled and reused. The cycles of water, oxygen, carbon, nitrogen and other essential elements of life must be perfectly controlled. They only eat hydroponic vegetables.

Will traveling to the stars be possible?

Will interstellar travel be possible? At the current level of our technology, the answer is clearly no. Will it be possible in the future? It is always dangerous to make predictions: reality often strays from what was supposed to happen. But it doesn't look like interstellar travel is going to become feasible anytime soon. Of course, in the scientific literature, both serious and imaginative, various methods have been proposed, some of which we’ll review in this and future posts, by analyzing the relative probabilities of each one.

Many writers consider interstellar travel the next frontier of human spread, and the only guarantee to avoid our extinction, either accidental, if a cosmic catastrophe occurs, or caused by ourselves with a nuclear war. The problem is, a trip to the stars would be much more difficult than planet exploration in the solar system. Apart from the sun, the closest star to us is 4.27 light-years away, just over 40 trillion kilometers. With our current technique, speeds of the order of one million kilometers per day can be reached, so a trip to that star would last more than one hundred thousand years. Taking advantage of the gravitational pull of giant planets, like Jupiter, it would be possible to triple the speed, but even so we are talking about tens of thousand years.