Relatively Painless Health Tips for Us Pensioners

Of all your possessions, your personal health is the most valuable and something that can’t be readily replaced once lost or damaged. There are going to be elements of your health beyond your control – you can’t stop the aging clock. But, many facets of your overall health are under your own control. Being healthy doesn’t translate into having to endure lots of dietary, etc. pain or restrictions.

Since the Year Dot there have been billions of articles, pamphlets, books, documentaries, Internet web sites, and other personal opinions that instruct you in how to be a healthier you. Over the millennia, all and sundry collectively have apparently achieved positive results – the average human lifespan keeps on keeping on increasing. No doubt each and every person has their own personal best way or philosophy of maintaining their health, and won’t hesitate to pass on their secrets to everyone else!

Yes indeed, everybody and their grandmother has THE solution to a healthy lifestyle and longevity. My dear old departed grandmother’s sole piece of advice to me as a child was to chew 32 chews with every bite of food. Even then I thought that was just about the dumbest piece of advice I’d ever received, and still do – no offence grandma. However, she lived to a ripe old age of 78 (that’s not a bad innings), so what do I know? I doubt I’ll make it that far. Anyway, different strokes for different folks, that’s my motto or philosophy. But as grandma had her go, here is mine, and forget the 32 chews!

Aspirin: There are lots of studies that suggest the common aspirin tablet has a mostly beneficial aspect to the average person if taken once a day or several times a week. However, not all people react positively to aspirin, and in some people can cause unwanted side effects like bleeding ulcers. See your medical practitioner first before taking an aspirin a day, but overall the vast majority of the population will benefit, not so much from the apple-a-day, but the aspirin-a-day.

Calcium: There are lots of trace elements essential to health, in this case having good solid bones that won’t crumble to dust in your maturing years. That something is calcium, most often found in dairy products. I get my daily dose from a cheese fix, but other dairy products are available. Don’t like dairy products? Well, one can buy over-the-counter calcium supplements instead.

Companion animals: Own a pet(s). Pet-a-puss! Lots of studies have suggested that having little something else in your life to focus on, something that can focus back on you – provide reinforcement to your attention – is beneficial to your state of mind, and mind influences the state of the health of the body. Translated, that something else is an animal companion (on the assumption that by the time health becomes an issue, that other ‘pet’, your kids, are no longer that something else in your day-to-day life; they are no longer your dependents. Companion animals however will forever and a day be dependent on you. So, not only will you thank the animal; the animal will thank you for being a loving guardian and looking after its welfare.

Dietary sins: There are about four of these with both pluses and minuses attached. 1) Alcohol provides calories, but empty (non-nutritional) calories. However, studies suggest that some alcohol is beneficial to mind and body. 2) Salt doesn’t provide any calories, and some salt is essential to a well functioning body, but too much can cause problems with blood pressure, etc. 3) Fats are high in calories, but also provide some essential nutrition; 4) Sugar, like alcohol, provides lots of empty calories. Since you need calories, sugar can have a positive role to play, but too much – well, a moment on the lips; forever on the hips.

It’s probably not likely for anyone to go the minimum route on all four ‘sins’. I say indulge in a reasonable way in two out of four that most appeal; absolute minimums on the other two. I personally take alcohol over sugar products; salt over fat, so I have a relatively large high alcohol, high salt diet, but I’ve nearly eliminated fat and sugar. Life’s too short to try for dietary perfection unless you’re content with a minimum sugar, fat, alcohol and salt diet. You’ve got to strike a balance between what you like, and what’s good for you.

Exercise: Experts suggest that everyone get a minimum of a half-hour of mild exercise/day. That’s real easy if you like walking, cycling, swimming, golf, or a host of other physical activities. On the other hand, I’ve never seen a jogger smile while running! If you don’t, like jogging, etc., then I suggest combining a half-hour of mild exercise while doing something else, accomplishing something else, that’s overall constructive at the same time as a substitute, something that you’re going to have to do anyway. That could be vigorous workout at housework; a half-hour of gardening; or, in my case, a half-hour walk, but to the store and back to buy the daily groceries or get other shopping done. Two birds with one stone. 

Genetics: It helps if you have a good genetic heritage. Actually you have no control over that, but by knowing the strengths, weaknesses, risks, and what did in your ancestors (parents, grandparents, etc.) you can take appropriate lifestyle steps to minimize your risk of going down life’s gurgler the same way.

Gums: I heard a long time ago that it was just as important to brush your gums as your teeth; a kind of massage for them, which probably helps to stimulate the blood flow through them and keep them healthy. Healthy gums make for better teeth. It sure ain’t because gums get cavities and need fillings! Anyway, I’ve adopted the practice and still have all my teeth firmly in place.

Hobbies: If you sit around the house bored out of your skull, that’s not good for your mental state which in turn has an effect on your physical well being. Hobbies help stimulate the mind, and everyone should have a hobby – actually several in case one loses its appeal for a while or peters out for one reason or another. One shouldn’t of course be weather dependent. I hear that mind gambes like chess or crossword puzzles or solving paradoxes or figuring out whodunits are especially useful for older, less able to be active, seniors. Hobbies don’t have to be expensive, though that’s between you and your bank manager if your hobby is collecting Rembrandts!

Iron: Iron is another one of those other trace elements that are essential to life and limb – okay, not so much a limb; rather in this case healthy blood. Foods rich in iron aren’t my thing, so I take an iron tablet as a dietary supplement. That works for me. But if you like lots of liver and spinach, you’re doing okay in the iron department.

Lifespan: I read a long time ago that two geographical regions had the longest and healthiest life-spans for their residents – The Japanese and those surrounding the Mediterranean region. In the former case, it was due to a diet high in fish. In the later case, it was due to a diet high in tomatoes. Both fish (and fish oils) and tomatoes apparently have positive values when it comes to contributing to overall healthy benefits.

Music: Music soothes the savage beast. Translated, listening to your favourite music has positive effects on your mental state; a positive mental state translates into a positive physical state – mind over matter. A happy mind makes for a healthy body. 

Organics: Eating organic foods are healthy eating right? Well, labelling something as ‘organic’ is just a PR rip-off designed to separate more of your money from you than you would otherwise pay for the same product but without the ‘organic’ label. One shop owner proudly displayed meat labelled with the word ‘organic’. I asked him to show me his range of presumably cheaper inorganic meats and of course he couldn’t since there is no such thing. All meat is organic. But the absolute height of idiocy was seeing a display of bottled water labelled ‘organic’. Now since does water contain the element carbon, which is what the word organic means, or should mean, as in organic chemistry – the chemistry of carbon compounds? And bottled water is another total rip-off. Tap water is just as good, cheaper and there’s no plastic bottles left over littering up the landscape. Actually, when my cats are faced with a choice of fresh tap water in their water bowl, or a rainwater puddle to drink out off, wild water wins hands down. Wild animals do very nicely drinking water that’s far less pure than what comes out of your kitchen or bathroom tap.

Purpose in life: You really need a reason(s) to get out of bed in the morning – some purpose in life. If you have no really real reason to get out of bed in the morning, you’ll vegetate. You may hate to get out of bed in the morning, but if you have a real reason to, a purpose, a responsibility to something above and beyond yourself, you’ll do it. There’s 101 plus purposes you could adopt as your own – charity work for one.

Sleep: Sleep is a very important part of our lifestyle. Much like oxygen and food and water, you can’t go on very long without it. And different people require differing amounts of sleep per day. However, as your time left on Earth as a living, breathing entity gets less and less; it’s seemingly a waste to spend one third or thereabouts of what’s left to you in limbo – asleep. You have personally got to decide for yourself a trade-off between quality of life remaining (lots of sleep; fully rested) and quantity of life (bugger sleep, live life 24/7/52) that’s left to you.

Smoking: Don’t smoke. Smoking is about as unnatural act as you can do and there is no shortage of nasties that are linked with smoking.

Stress: We all have to deal with stress to some degree or other. Mother Nature, fellow humans, politicians, and the tax man all throw curveballs at us 24/7/52. I’m sure even the world’s richest human; dictators, presidents and prime ministers, the British Royal Family; and associated pampered upper-crusts have to deal with some stress now and again. No one is ever stress-free all the time. Surprisingly, some stress is beneficial. It keeps you focused and on your toes. Too much stress stresses the mind too much which has an effect on the rest of the body – ulcers if nothing else. The only advice I have is plan ahead where possible to minimise or deflect future stressful situations; and try not to worry over those things you have absolutely no control over. It also helps if you have a friendly shoulder to cry on!

Thinning your blood: An ancient remedy for whatever ailed you was often to have leeches attached to your skin and having some of the blood sucked out of you. Apparently that had positive results in many cases. I’m not going to advocate you attach leeches to you, but there is one way to thin your blood, obviously beneficial to you, and also to others, and that’s to donate blood on a regular base if eligible. Losing 500 ml of your blood every 12 weeks doesn’t harm you one jot. Not everyone can donate of course – an aspirin a day can accomplish a bit of thinning as well or as an alternative. 

Variety is the spice of life: Don’t stick yourself in a total rut, even if routine is comfortable. Vary your daily routine or diet, even if just a little, so as to experience something new. If the one-off experiment flubs, well nothing ventured, nothing gained. You can then try something else. If you can’t find one tiny variation to your normal routine or diet per week, you’re not trying hard enough.

Waste products: Unfortunately, the very process of living means that your body has to intake various chemicals, process them, and eliminate the unwanted residues – waste products. There are four ways the body eliminates or gets rid of waste products – sweating, exhaling, urine and faeces. You don’t have any real control over exhaling – mainly carbon dioxide. You have relatively little control over sweating, which mainly eliminates salt from your system (which is not always good; your body needs some salt); you also don’t have much of a say in your more solid wastes. However, you can have some control over all those waste products that build up but ultimately get eliminated in your urine. You don’t want those waste products hanging around any longer than necessary. You can drink water, or products/foods that contain a lot of water. Extra water has to be eliminated, and along with it those other waste products that have accumulated. So, drinking lots of liquids, or eating foods which contain a lot of water like pasta, eliminates waste products building up in your blood stream that much faster. Good riddance to bad rubbish that does you no good while inside of you. 

Weight loss: There is one and only one way to lose weight. You have to burn more calories than you ingest. Say you need 2000 calories/day but want to lose weight. Most people go on a crash diet of say 500 calories/day and they are miserable. My solution is to ingest 1800 calories. Sure, weight loss will take longer, but because there’s hardly any real pain, it’s sustainable and you eventually achieve your goal. The other alternative is to keep ingesting your quota of 2000 calories, but start to burn off 2200 calories/day – like getting a bit more exercise. Then too, you could both eat just a little bit less; exercise just a little bit more. Rome wasn’t built in a day; weight loss isn’t a one-day affair either. Think long term.

Finally, for a happy healthy life, empty what’s full; fill what’s empty; scratch where it itches.

P.S. Essays like this are all well and good, but they are no substitute for consulting your favourite heath professional/medical practitioner for spot-on up-close-and-personal advice that conforms to your specific needs.

The Rare Earth Hypothesis: Part Two

If the Search for ExtraTerrestrial Intelligence (SETI) is a viable experiment and not a waste of time; if UFOs and ancient astronauts are facets that help document the existence of extraterrestrial intelligence, then the very existence of an advanced extraterrestrial intelligence with technology has to be plausible in the first place. Unfortunately, it’s a long hard road to get from inorganic chemistry through to E.T. and there are many possible bottleneck hurdles that have to be overcome before the one evolves into the other. Goldilocks factors – not too this, not too that, but just right – have to be with you every step of the way. IMHO the major bottlenecks are the transition from unicellular to multicellular life and the evolutionary development and use of technology.

It’s been pointed out by others, and based on my readings I tend to have to agree, that astronomers (physical scientists) tend to be much more optimistic and supportive of the notion that advanced life forms in the Universe (extraterrestrial intelligence) are a dime-a-dozen relative to biologists (life scientists), who hedge their bets and who it must be said are presumably better qualified to pass judgments. So, taking things from a more biological perspective, what’s what?

Continued from yesterday’s blog…

There are apparently just too many planetary Goldilocks factors at play to grant the probability that complex, multicellular, animal, life is common throughout the cosmos. You need to be in a quiet part of the galaxy – no nearby supernovas, black holes to suck you in, gamma ray bursters, etc. You need a long lived stable single star. You need a gravitationally stable solar system so that planets are not gravitationally disturbed out of their orbit and either plunged into the parent star or cast out of the parent system altogether. You should have a good Jupiter(s) to absorb and/or gravitational deflect comets and asteroids that would otherwise slam into your otherwise environmentally-friendly planet causing havoc to established life forms. You need a planet that’s in a pretty circular orbit, one that doesn’t stray too close or too far from the habitable zone surrounding the parent star. The planet must have a fairly stable temperature range over geologic time periods, and so you must have an atmosphere, and thus has to be massive enough to retain an atmosphere, without being so massive that you end up with a brown dwarf - a quasi-stellar body. The axis can’t have an extreme tilt, and it would greatly assist if the planet had a large moon around it to assist its long term stability. You need some sort of plate tectonics to ensure land building and the recycling of materials. If it’s intelligence, with technology you seek, the planet can’t be a water world. The planet must have formed in a region abundant in the heavier chemical elements (oxygen, sulphur, carbon, silicon, nitrogen, various metals, etc.). When you take all those factors (and more) into account, the number of suitable abodes where simple life can slowly evolve into complex life decreases rather quickly. And there’s no guarantee that there is really any directed purpose to evolution in that evolution doesn’t require simple life to become complex life. Survival and leaving offspring is what it’s all about, and if single cell critters do that what more is needed?

One note about planetary disasters or catastrophes is that these cut both ways. They can’t be frequent enough and/or large enough to wipe out the entire biosphere in total, especially the biosphere comprised of complex life forms, but on the other hand, infrequent small disasters can spur on evolutionary change by opening up environmental niches, but depending on who or what you are, when you are, and where you are, a disaster can be a double edged sword. I mean if you’re a T-Rex sixty five million years ago, its bad news. On the other hand, without the bad news for T-Rex, we wouldn’t be here, so for us, an asteroid impact 65 million years ago turned out to be good news!

It’s also difficult to naturally transport complex life around the galaxy, unlike microbial life. If a meteor hit Earth and blasted a chunk of terra firma off towards Mars, pity the poor cockroach going along for the ride. Cockroaches are tough, but not that tough. And even if a cockroach did make it alive to the surface of, say Mars, it wouldn’t survive long.

Anyway, once you have multicellular critters that have survived and thrived in a reasonably stable part of the Universe over many generations, will they evolve intelligence? I mean finding an extraterrestrial equivalent of a trilobite is all well and good, but we want to find beings more like ourselves.

IMHO, intelligence, the ability to figure things out, has evolutionary survival value and will tend to be selected for, and thus over time, there will tend to have evolved life forms with ever higher IQ’s. Here on Earth, just about all mammals and birds, and some exceptional invertebrates (the cephalopods like squid and the octopus), have reasonable IQ’s at least when compared to bacteria, plants, insects, fish, etc. Of course just as some kinds of organisms are faster than others, or have keener senses of sight or smell or hearing, not all advanced organisms are going to end up equal in the IQ stakes. But, the fact remains, the ability to think, to figure things out, can only increase your odds of survival and leaving behind more offspring.

Finally, for SETI to succeed, for UFOs to be alien spaceships, one needs our intelligent species to develop technology, and here’s where I see bottleneck number two. The evolution of technology isn’t inevitable and has a lot of just-so factors attached.

Firstly, your home planet has got to come equipped with the right sorts of materials like oxygen and metal ores and other objects than can be turned into useful tools, and of course a suitable supply of various energy sources. That’s not a given.

Water worlds are out of the running since it’s difficult to discover and utilise fire in that sort of environment.

You can’t have all your required locomotive appendages in contact with the ground – some have to be free to manipulate objects in your environment. Birds have wings that are off the ground, but since wings aren’t good at making tools, that seems to rule out wings and birds of a feather pretty much as well

So, we’ve already ruled out dolphins and whales and the cephalopods being water based creatures, and the birds with their useless wings as far as building things is concerned, and all the four-footed walking mammals.

It might be conceivable that you can build up a technology using your mouth parts and/or using a tail to manipulate and build things, but we don’t have obvious terrestrial case studies, although you might argue that bees and wasps and termites and ants and birds can build elaborate structures using just their mouths.

It’s not all that obvious that technology actually adds all that much value towards ultimate long-term survival. Lots of technological advancements do, like controlling fire, developing agriculture, the rise of modern medicine and food technologies. But then lots of modern technological wonders, the automobile, CDs, sofas, microwave ovens, and thousands of other consumer products don’t really contribute to our overall survival – certainly cars don’t when considering the road toll! Then that brings up the fact that things technological can sometimes work in the opposite direction. Toxic this, pollutant that, nuclear the next thing; then throw in a bit of global warming; the rise of urban city living with overcrowding and in general overpopulation; chemical, biological and radiological warfare/terrorism; instruments of warfare in general, like guns; the overuse of antibiotics and the rise of antibiotic resistant germs; exposure to electromagnetic fields – well, the list of horrors or potential horrors goes on and on.

It makes for an interesting question: would mankind ultimately survive longer had technology never entered the equation, or not? It’s an unanswerable question in that 1) we can’t run the contrary as a controlled experiment, and 2) that the genie is well and truly out of the bottle and there’s probably no turning back now.

So, overall, SETI might not be able to detect our technological and communicating kin out there, and UFOs might not be alien spaceships right here, because it’s 1) hard to evolve multicellular organisms, and 2) technology isn’t inevitable and might even be counterproductive. Thus, Earth, with its multicellular critters and humanity with its technology, is quite the rare planet within the Universe – according to some.   

The main proponents of what is now called the ‘Rare Earth Hypothesis’ are the scientists Brownlee and Ward (see below), and they have certainly stirred up an astrobiological hornet’s nest with the idea. That’s good for science in the long term. The belief in an unproved but accepted scientific proposition, in this case that that there are lots of complex alien critters out there, needs to be challenged if fields of inquiry aren’t going to stagnate. However, make no mistake, it is the ‘Rare Earth Hypothesis’, not the ‘Unique Earth Hypothesis’, so religious fundamentalists who have taken this hypothesis to their hearts; who still need Planet Earth, and human beings, as some sort of religious special creation, should really not take comfort from these ideas.  The Copernicus Revolution is still alive and well.

Further reading:

Brownlee, Donald & Ward, Peter D.; Rare Earth: Why Complex Life Is Uncommon in the Universe; Copernicus Books, New York; 2000:

Burger, William C.; Perfect Planet, Clever Species: How Unique Are We? Prometheus Books, Amherst, New York; 2003:

Morris, Simon Conway; Life’s Solution: Inevitable Humans In A Lonely Universe; Cambridge University Press, Cambridge; 2003:

Are We the Proverbial “It”? Part Two

Every one and their great grandmother has apparently had a go at, and calculated a value for the Drake Equation (named after radio astronomer and SETI scientist Frank D. Drake). The Drake Equation estimates (guesstimates is actually more accurate) the number of extraterrestrial civilizations in our galaxy that could in theory say “Hi” to us and receive our “Hello” in return by examining all the factors that are part and parcel of that scenario. Seeing as how the Universe is some 13.7 billion years old, and seeing as how the current human species has been around for only some 200,000 years (give or take), then I have to ask, is it logical to assume that we’re the proverbial “It”? Here’s my two cents worth.

Continued from yesterday’s blog…

Lastly, there’s the issue of longevity. If your neighbours move in, but then move out again in less than 24 hours, that doesn’t allow much time to meet them and chat over afternoon tea - blink, and they’re gone. But if you’re both on the block for twenty years, that allows lots of time for afternoon teas, philosophical chats and bridge games, etc. So, how long do technological civilizations last?  

Well, the pessimist will look around and cite global warming, probably antibiotic resistant germs giving rise to pandemics, chemical, biological and radiological warfare and/or terrorism, the extinction of species, rampant pollution, and in general an overall quality of life heading rapidly down the gurgler, right down to the point that the human race will to extinct – by our own hand. But if you’re an optimist, then the sky’s the limit.

Longevity – It’s hard to imaging what human civilization, what humans themselves, will be like 1000 years from now, but if you could come back 1000 years hence, would you indeed find a human civilization, indeed find recognizable ‘humans’ at all? Once you have evolved to the stage of being a multicellular critter with intelligence and technology, then physics and chemistry and plain everyday evolutionary biology are no longer in control of your evolution. You are now in control! You are in control not only over the future evolution of other species (artificial selection instead of natural selection) but of your own evolution. The age of the designer baby is already upon us, albeit still in its infancy (pun intended). What will another several more decades bring to this now embryonic field but obviously an ever ongoing and continuing maturity! 

Humans will probably go kaput within 1000 years, not because of a global nuclear war, or pandemic, or asteroid strike, but because they have by their own hand evolved into something else, and the process has already started. In fact, it’s possible that in 1000 years there could be two humanoid species on Earth. One will be an amalgamation of flesh and blood plus ‘iron and silicon’; the other pure ‘iron and silicon’ (robots).

The first is not too difficult a swallow. Just replace or augment flesh and blood bits with ‘iron and silicon’ bits (or wood bits, or ceramic bits, or plastic bits, etc.). Look at most pirate films and you’ll see those beloved peg-legs and hook-hands. Do you wear glasses or contact lenses? What about a hearing aid? Perhaps you have an artificial joint(s) or a heart pacemaker. You surely have a dental filling (or two), maybe even dentures. Then there’s artificial skin and all manner of other internal or external types of technology that have replaced your failed flesh and blood – like kidney dialysis. There’s now serious talk about the development of a bionic eye within a few years (to go with the bionic ear). What further artificial bio-bits will be available in another 20 years, another 50 years, or another 200 years? The era of the “RoboCop” or an actual “Six-Million Dollar Man” (and “Woman”) is nearly upon us.

Within 200 years or so, I can envision that one will be able to download the contents of a human mind into an ‘iron and silicon’ equivalent.  Why? Well, does the word ‘immortality’ (or as close to immortality as makes no odds) suggest a possible reason? You don’t think anything of endlessly replacing worn automobile parts for new parts to extend the useful lifetime of your car. Why not endlessly replace your worn parts. Your mind (brain) won’t last forever. Replace it - transfer it to a more durable technology Do it again, and again and again as is necessary. In fact, one might create a mega-mind or super-mind by merging into an ‘iron and silicon’ body a lot of minds. By merging the minds of say a cosmologist, general relativist, quantum physicist and mathematician, one might speed up the development of the Holy Grail of physics, the Theory of Everything (TOE) – which is a theory of quantum gravity. 

Once your mind is contained in an ‘iron and silicon’ ‘head’, just attach that to an all ‘iron and silicon’ ‘body’. Immortality indeed!

All of which leads to a future Earth inhabited by a humanoid robot species, artificially evolved from today’s human species. That process too has already started. Robotic appliances, even artificial ‘iron and silicon’ ‘pets’ are on the market. Research into artificial intelligence is ever ongoing. Watch that final minute of the final episode of the TV revision of “Battlestar Galactica’! How about those sci-fi “Transformers” or “Terminators”, or Data (from “Star Trek: The Next Generation”)? Then there’s “Doctor Who’s” Cybermen or Daleks (though they’re part machine; part organism). Think of those robots from “Westworld” or “Futureworld” where nothing can go wrong, go wrong, go wrong, go wrong, go wrong… Then there’s “The Stepford Wives”, “Cherry 2000”, the original “Battlestar Galactica” Cylons, and many more. It might be just science fiction today – could it be science fact tomorrow? There doesn’t seem to be any violation of physics involved. Everything not forbidden is compulsory! However, some of those sci-fi scenarios suggest that perhaps ultimately there might be a conflict between the (part) machines we become, and the (artificially) intelligent machines that we create!

Of course we’re in control, so a robotic future isn’t of necessity compulsory. But I suspect it will happen. Why? There are rational reasons for humans deliberately abandoning their flesh and blood existence and evolving themselves, if not 100% into ‘iron and silicon’ then at least into something part flesh and blood coupled with part ‘iron and silicon’ – sort of like we have today (recall those dentures and peg-legs). 

Quite apart from immortality arguments, it’s nice having more indestructible bodies and bodies that can be more easily repaired. Death won’t go totally away of course – accidents still happen. Presumably, your mind will be able to absorb 10, 100, 1000 times the amount of experiences and memories and knowledge, etc. than is currently the case. You might be able to explore environments now closed to you, like taking a stroll across the sea bottom – kilometres down – in your robotic ‘birthday’ suit. All of which then opens up the entire ‘boldly going’ experience. What’s the hardest part of going to Mars? – it’s the flesh and blood frailty of the human body – the need for gravity and oxygen and organic food and water, and space suits, and how you can’t carry spare flesh and blood parts along too, etc.  Extrapolate to our exploration of the entire solar system, then our stellar neighbourhood, eventually the galaxy. Even if you don’t want to go yourself, well, there’s artificial intelligence housed in perhaps nanotechnology bodies, spreading throughout the cosmos like so much cancer.  

The ultimate point of all of this is that if eventually us (humans), why not them (extraterrestrials) now? Translated, after a relative short period of biological development, a civilization can obtain longevity that evolutionary development into ‘iron and silicon’ provides, coupled with far easier expansion into the realm of outer space.

This level of technology can also partly undo the bottleneck created by the relative improbability of multicellular evolution. There maybe relatively few multicellular infested planets, but once technology of the ‘iron and silicon’ kind happens on them, then boldly going, being fruitful and mechanically multiplying and colonizing the cosmos rapidly fill that gap.

All of which doesn’t mean that we are, in the here and now, the proverbial “It’. However, there are enough ‘probability one’ or certainty factors that suggest this is rather unlikely. The proof of the pudding will be to find them; or for them to find us.