Posts Tagged alien life

The “Welcome to Earth” generation calls it quits

Posted by on Thursday, 28 August, 2014
A generation without aliens

The “No Aliens” Problem

THE ALIENS WHO NEVER CAME

Aliens were somewhere. Not  on the moon but probably Mars.

Maybe Jupiter and Saturn too.

Astounding Science Fiction wasn’t the greatest place to get your science but in high school, we relied on it. Astounding told us about the caves that aliens lived in,  the mean things they did,  and the methods of transport they would use to land on Earth.

Myself,  I was very pro alien. I had high confidence that they weren’t going to eat us. And –  more important – that they wouldn’t get all the girls.

By college,  Earth was still alien free. I had Dr. Medicus for physics. Aliens were the least of my worries.

Ten years later,  there was still nothing .This was a surprise. Not a single visit from a single planet. The first American had landed on the moon but no extraterrestrials had returned the favor. We were headed for space but space wasn’t headed for us.

By now, we were launching probes to the planets. The more we saw of the planets, the more obvious it was that there weren’t any cities up there. Venus was hot and shrouded in vaporous clouds of sulphuric acid. Mars was colder than Antarctica and its surface was full of craters. And Saturn was gaseous with rings of rocks and ice.

Scientists were fascinated, of course.

Me?  I couldn’t BELIEVE it! Where were the damn cities? Alien life wasn’t as common as my generation had thought it would be or as Astounding Science Fiction had (more-or-less) promised.

For quite some time – since 1960 – radio astronomers on earth have been looking for signals. By 1977, we thought we might have heard from our first alien. That signal is now called the “WOW” signal because of the exclamation scribbled across the stripchart.

We never heard it again nor have we received any other credible signals since. If we do hope to find some form of intelligence, we are going to have to look harder. And further.

EXOPLANETS

In the late 80s, we learned about “exoplanets.” An exoplanet was a planet that was going around some star other than our own sun; maybe we would find evidence of life by analyzing the atmosphere of an exoplanet. The first of these things was discovered in 1988 circling Gamma Cephei. We have found hundreds of them by now. They’re very common. There are hundreds of billions in our galaxy. Many, many trillions across the universe.

If you’re a fan of aliens, this makes you happy.

GIVING IT UP

I am in my seventies. I have spent almost an entire lifetime waiting. Nothing has turned up and I don’t think anything will.  The horrible fact? We are completely alone in the solar system and aren’t hearing from anybody in the “neighborhood”.

Will we ever find life?

Some day we will find microbes . The hunt for “bugs” is more intense than ever but, as far as locating our “co-equals” out there is concerned?  We really haven’t heard from any other technical civilizations. Not when I was a kid. Not when I was an adolescent. And not during my ridiculously long life.

Not one.

If there are alien civilizations, radio isn’t a handy way to prove it. The nearest “civs” are probably too far away for radio round trips. It takes too long to get an answer back and the signals would probably be hopelessly drowned out by noise.

Want more?

It seems the “broadcasting era” is a short one for a technical civilization. We’ve been switching to buried optical fiber cables. The “other guys” would have done the same things too after a very short time so there are b-i-g problems capturing a signal that’s probably not even “out there”.

No signal, no contact.

Even more?

Even if, by some miracle of cosmology, we did get ourselves a signal, many experts say we would “never in a million years” be able to extract the meaning. This is because of the problems of how the signal would have been modulated, because of digitization schemes, and, of course, figuring out a (very) foreign language from a (very) foreign culture.

Here’s what it comes down to. For my generation, big eyed aliens are off the menu. If they’re out there, they’re way out there.

They might as well not exist all.

There won’t be any warm embraces with un-Earthians. No White House tours. No revelation of the wisdom of the ages.

Maybe bugs though.

Is this fair?

Doesn’t my generation deserve better?

I think so.

On behalf of my generation, this is MISTER ScienceAintSoBad bidding goodbye to the aliens who never showed up.

– – – – – –

The drawing is mine.

 


Mysterious Unknown Forms Share Our Planet? It Seems Possible

Posted by on Saturday, 16 November, 2013

 

Funny cartoon about the "shadow biosphere"

UNRECOGNIZED?

CAVES WITH LIZARDS

We once thought there might be “people” on Venus or Mars.

It seemed possible.

We didn’t know much about planets. Maybe there were caves with lizards.

Now we know almost too much. We have equipment routinely exploring the surface of Mars, probing, drilling, sniffing, analyzing. Lizards, we would have seen.

The search for life “out there” goes on. Nothing yet. Maybe nothing til hell goes cryothermic.

The reason I bring this up is that there are people with an interest in alien life who think we missed it. They think it’s on our own planet.

Don’t look up, they say. Look down

SHADOW BIOSPHERE: A WORLD WITHIN A WORLD

The bugs who were our ancestors weren’t bashful. They got going as soon as there was the least little chance that they could move in. By about 3.6 billion years ago  the crust of the earth was more or less solid.   Suddenly, somehow, life popped up. We don’t know exactly how. We have some theories.  We do know that some very  simple organisms eventually evolved into the sports crazed organisms of modern day.

How many times did life get going?  Were there some bad designs that didn’t do well – more homely, maybe,  than our own DNA kind? Based on entirely different processes?  Did they hide out in isolated “niches”? And nobody bothered them? Are they in seawater maybe at low concentrations?

Carol E Cleland (Center for Astrobiology, University of Colorado), says we won’t find this parallel universe of living things if we don’t look for it. And we almost certainly missed it if it is there. It would have flunked all of our “is that thing like me?” tests.

The idea of a Shadow Biosphere is appealingly simple. It’s safe and easy. We live here. So do they, maybe. We can do the search on a shoestring without launching rockets.  If we do happen to find something really weird – something that’s alive but built along different lines than our own strand of life, we will know for a fact that 1) life is not to be denied. It’s opportunistic. It will flourish if it can flourish. 2) We will also know that it’s on other planets.  Period. If you were yearning for extraterrestrial life, you would then be able to relax knowing that it will, eventually, show up elsewhere.

How’s that for a cheap experiment?

Dr. Cleland’s article, The Search for Shadow Life, is in New Scientist.

– – – – – – – –

Regular readers will recognize the cartoonist as the author.


LIFE “OUT THERE” LOOKS LIKELY

Posted by on Wednesday, 9 November, 2011

 

 

STAR GOO

Remember how Doctor Spock and Captain Kirk, in the Enterprise, were always running into alien life forms? I don’t believe they ever explained, exactly, how the plug uglies they encountered happened to be up there (or maybe I missed that episode). Did they evolve from monkeys just as we did? Very homely ones? Were their planets colonized by refugees from Earth who, under the constant bombardment of gamma rays on Alpha Four, began to look like they had a case of bad stage makup?

Maybe there’s another explanation for how alien civilizations get their start. Two researchers at the University of Hong Kong say the “building blocks of life” are everywhere, waiting for the deft touch of nature (or, if you prefer,the finger of God) to turn them into living cells.

They (the researchers) say stars make a petroleum like substance which is full of complex organic molecules. Aromatic rings, even. This  “Star Goo”, eventually, spreads throughout space.

The last time we watched life get started – um that would be the first time too – it happened in the wink of an eye. A cosmic eye, anyway. Since we know there are lots of planets and lots of water out there and, now,  thanks to Kwok and Yong Zhang , we know that every star in every galaxy contains  an E Z STARTER KIT FOR LIFE , it’s a good bet that there are plenty of living creatures to be found.

BUT NOT A SINGLE DROP TO DRINK

Doesn’t that just suck?  Living creatures inhabiting biological niches throughout this busy universe, and, yet, we continue our lonely existence with no practical way to know who or what is out there? Life everywhere but “not a single drop to drink”?

As it were.

For a while, the SETI Project seemed like it might come up with something but it’s beginning to dawn on some that we’re probably barking up the wrong antenna. Our own civilization sends out very few stray radio waves anymore.  More underground cables. Less antennas. If it’s like that, upstairs, this is bad news for SETI.

Sad, I suppose, although, maybe it’s good for us to figure things out on our own. And, maybe, we’re better off without yet another higher power. Heaven KNOWS we’re having enough problems with the lower ones.

Get this though. There may BE a way to sniff out another civilization. Wouldn’t aliens, independently, come up with the idea of artificial light? Just like we did? It makes sense.   Abraham Loeb and Edwin Turner think so. Loeb (Harvard) and Turner (Princeton) feel that a well lit alien city could be detected with a sensitive telescope. It would have to be  more sensitive than anything we have now but, with the right filters, a new generation of telescopes might do the trick.

At least, that’s the theory.

————-

Image by Mister SASB