Reality Straight Up!

Thoughts & Observations of a Free Range Astrophysicist

Cosmic Octopus

The Octopus and ET

Is intelligence an evolutionary forced move?

Evolution has no goal, but there are things that it stumbles onto over and over again. If the other-worldly octopus is any indication, intelligence could be common wherever complex life appears.

This article originally appeared in my Astronomy Magazine column, For Your Consideration.


It’s been 55 years since Frank Drake introduced his famous and eponymous equation, a product of rates and probabilities used to estimate the number of technological civilizations in our galaxy. Drake could only guess at most of the terms’ values when he conceived of the equation, but we’ve learned a lot since then. We know the rate at which Sun-like stars form. We know that planetary systems surround almost every star, and that potentially habitable Earth-like planets are common.

When pondering extraterrestrial intelligence, sometimes Earth is our only guide.

The Drake Equation

The Drake Equation is used to estimate the prevalence of extraterrestrial intelligence in the galaxy. The number of galactic civilizations with which we might communicate (N) is the star formation rate (R*), times the fraction of stars with planets (fp), times the average number of habitable planets per system (ne), times the probability life will arise (fl), times the probability life will become intelligent (fi), times the probability that a civilization capable of communicating will arise (fc), times the average lifetime of such a civilization (L).

For some terms in the Drake Equation, Earth is our only guide. Terrestrial life arose quickly, but it took almost half the current age of our star before diverse complexity exploded on the scene. In contrast, once hominids appeared it only took a thousandth the age of the planet to go from stone tools to walking on the Moon. How long advanced technological civilization will survive remains to be seen.

One term in the Drake Equation concerns intelligence. Given the opportunity, is intelligence likely to evolve, or is the step from life to mind an all-but-insurmountable hurdle?

In my July column, I described how engineers are using genetic algorithms to evolve new technologies. In that instance, as when breeding dogs, evolution is guided — it has a direction. But the only thing guiding evolution in nature is survival. Evolution by natural selection isn’t moving toward anything. Rewind the clock and start life on Earth over again and the world would not be the one that we know today. There would be no humans, no us.

The eye is an evolutionary “forced move.”

But would there be intelligence? Let’s come at that question sideways, starting not with brains but with the evolution of eyes. From vertebrates, to insects, to crustaceans, the natural world abounds with eyes. Eyes evolved independently as many as 65 times. The question is, if evolution doesn’t know where it’s going, how does it keep ending up in the same place?

Diverse Eyes

Evolution has invented eyes from scratch as many as 65 times, making the eye an evolutionary “forced move.”

A single mutation isn’t going to give an organism an eye, but it could invent a protein that reacts with light. That is enough to get the ball rolling. In a world of the blind, even a simple light-sensitive patch offers a competitive advantage. And if, by chance, your light-sensitive patch were curved, that would tell you something about where the light is coming from. That newfangled curve might help you zag to safety when others zig to their demise, helping your genes survive into the next generation.

Generation after generation, natural selection favors more and more pronounced curves. From curve, to cup, to pinhole camera, to a protective membrane that becomes a lens, every small step offers a survival advantage and so is selected for.

The eye is an example of what philosopher Daniel Dennett calls an evolutionary “forced move.” The form of the eye is not predetermined. Eyes range from compound eyes to the virtual Schmidt cameras found in some deep-sea fish. But courtesy of geometrical optics and the survival advantages of gathering progressively better information about the world, evolution invents eyes again and again.

Intelligence has also evolved from scratch on Earth more than once.

So, starting with a primitive nervous system, does each small step toward intelligence convey survival advantage? Does this mean evolution of intelligence is also a forced move?

If you have never Googled “octopus video,” you should. Octopuses are curious creatures, by which I mean they possess curiosity. They solve complex problems, have excellent memories and individual personalities, and learn by watching others. They play. They plan. They use tools. They are escape artists and annoy aquarium keepers by taking things apart to see how they work.

Humans and octopuses parted evolutionary company something like 700 million years ago, yet each evolved problem-solving intelligence. The Larger Pacific Striped Octopus has even evolved the beginnings of social intelligence. It mates beak to beak, lives in groups, shares dens, and lays eggs multiple times instead of only once. Given another few million years to evolve, it is hard to say where they might end up!

Octopus and Extraterrestrial Intelligence

Intelligence has evolved on Earth more than once, suggesting that intelligence might be a “forced move” for evolution. But as this octopus and I regarded each other off the coast of Cozumel, neither of us could begin to fathom what the consciousness of the other must be like.

The octopus is an alien intelligence among us.

Citing the Cambridge Dec­laration on Consciousness, some researchers even suggest that octopuses may be sentient. They may think, feel, and experience. But what would consciousness be like to an animal with two-thirds of its neurons distributed throughout its body and arms that can act independently from the central brain? Cut off an octopus’ arm and the arm keeps doing things, including capturing prey and trying to feed a mouth that is no longer there.

Many times while scuba diving I have settled in to watch an octopus with absolutely no doubt that the octopus was watching me right back. Is it a fluke that, starting from scratch, evolution invented intelligence more than once? Or does each small step toward intelligence offer some advantage, making intelligence, like the eye, an evolutionary forced move? If so, extraterrestrial intelligence may be common wherever complex life appears in the universe.

But as I think about the octopus, I doubt that we can even begin to imagine just how profoundly “other” that intelligence might turn out to be.

The Octopus and ET ^ Is intelligence an evolutionary forced move?  © Dr. Jeff Hester
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Click on thumbnail to select post:

  • Real Anti-Racism:It’s not what you thinkPosted in Thoughts
  • Watching Rome Burn & Hell Freeze  The fun physics of global cataclysmPosted in For Your Consideration
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  • Shaking the hand of someone you disagree with isn’t as much fun as shouting them down, but it is far more effective.


    When you live in small groups on the savanna, as our ancestors did for most of our evolutionary history, it pays to be suspicious of strangers. Other groups were competition. Strangers didn’t drop by for a cup of tea and a friendly chat about our emotional well being. We couldn’t afford to see a stranger as a real person at all.  It was an “us versus them” world. Fear and aggression were the only rational responses. People who did well in that world (AKA our ancestors, the people from whom we get our DNA), knew that the only safe thing was to beat strangers with a club first and ask questions later.

    Fear of “The Other” is hardwired, and talking about it doesn’t help.

    We may not live in small groups on the savanna any more, but our brains don’t know that. For better or worse we are stuck with our evolutionary baggage. Nothing is going to change that. When you encounter someone who your brain perceives as “other”– and by this I mean you personally, dear reader, as well as myself and every other human on the planet — all of that machinery jumps to life in milliseconds. Long before we are consciously aware of anything, our brains are screaming “Danger Will Robinson! Danger!”

    Call this tribalism. Call it racism. Call it in-group/out-group dynamics. Call it identity politics. Call it polarization. Call it whatever you like. It all comes down to the same thing. When we perceive someone as other our reactions are hard wired, preconscious, and impossible to turn off.

    Good intentions don’t matter. Get high and sing Kumbaya all night. Talk about it until the cows come home. Hold workshops. Post platitudes or scream about it on the internet. If you want to judge the effectiveness of those strategies all you have to do is pick up the paper. The louder the mob screams, the more ground they lose. We’ve tried those approaches. They make things worse, not better.

    Quoting Einstein’s famous parable, “Insanity is doing the same thing over and over and expecting different results.”

    There is only one solution: Humanize yourself by embracing the humanity of others.

    If you perceive someone as other you will respond to them as a threat. There’s nothing we can do about that. Or is there? Take a step back and the answer is obvious. We can’t change how we react to other, but we can change who we perceive as other.

    There is going on 70 years of really fascinating sociological, psychological, political and even neurological research that all supports the same conclusion: If you know and respect someone, it’s hard not to care about them. Break bread together, laugh together, talk deeply, listen, show respect (even when it’s difficult), build bridges, find common purpose and work arm in arm.

    I could dig into that research, but mercifully for you I won’t. Instead I am going to share an uplifting and illustrative story of what effective anti-racism really looks like.

    How did a Black musician change the hearts of hundreds of Klansmen?

    Daryl Davis is a Black blues and jazz musician with a very strange hobby. He goes to events like KKK rallies not to shout or protest, but to listen, shake hands, talk, and befriend. Literally hundreds of the Klan members who Daryl Davis has become friends with have renounced the Klan. He has a large collection of their robes, including the robe of a man who, when they met, was the Grand Wizard himself.

    Read that last sentence again. Then if you honestly care about fighting racism you owe it to yourself to invest 18 minutes and listen to Daryl Davis’s story in his own words.

    This is not your Woke friend’s Anti-Racism.

    It feels good to gang up and shout at people. The difference between the shouters and the shoutees makes it really easy to tell who is “us” and who is “them.” Our brains love that. The dopamine flows like a river.

    But that is not what Daryl Davis did. There was no shouting about racism. Terms like “White privilege” and “White fragility” were never used. Daryl Davis never complained about microaggressions or political correctness. DEI workshops were not part of the program. Mr. Davis did not wear his feelings on his sleeve. Quite the contrary, Daryl Davis listened even to open hatred and tried to understand where it was coming from. There was no talk of victims and oppressors. There were no social media attacks or calls for deplatforming. There was no virtue signaling about Wokeness.

    Instead, Daryl Davis treated those who were predisposed to hate him with dignity and respect. He listened. He questioned. He befriended. He humanized himself by seeing and acknowledging the humanity of others, including those with whom he deeply disagreed. In the process he did what few have ever accomplished. Daryl Davis changed the hearts of hundreds of the most committed racists in the nation.

    This is what real, effective anti-racism looks like. And as Davis mentions at the end of his talk, if he can do it, so can we.

  • What do record fire seasons in the West, record hurricane seasons in the Atlantic, record winter storms in the South and the hottest years in history have to do with each other? Everything.

    This article originally appeared in the December 2019 issue of my Astronomy Magazine column, For Your Consideration.

  • You don’t tug on Superman’s cape. You don’t spit into the wind. Yes, schools are desperately important to kids. No, COVID-19 doesn’t care, and COVID is making the rules right now. Attempts to open schools this fall will fail of their own accord. The relevant question is how to meet the needs of children, families and the community in the face of that reality.

  • Currently new cases of COVID-19 in Arizona are doubling every 7 days. ICU beds in the state are already full. The rest of the country isn’t that far behind us. You do the math.

  • Now is not the time for scientists to be circumspect and silent. We are on the short end of a battle over whether truth even matters. If scientists do not stand up for what is real, who will?

  • The morning cyclist in my neighborhood may not be standing in the Michigan Statehouse carrying a gun and demanding her right to spread contagion far and wide, but she may as well be.

  • You know those nice charts and graphs that make it look like we are over the hump of COVID-19 and that things are about to get better? Those predictions are dead wrong, with an unfortunate emphasis on “dead.”

  • Imagine three gregarious scientists, each with the gift of the gab, all coping with stay-at-home orders. Of course we started a livestream/podcast talk show! What else would we do? Welcome to the kickoff episode of Scientists Stuck Inside.

  • Even after COVID-19 kills hundreds of thousands in the U.S. over the coming weeks, we will still be almost as vulnerable to the pandemic as we are today. We’d all love to “get back to normal” after that, but the price could be a second wave, worse than the first. Some see us facing either economic Depression or allowing vast numbers of preventable deaths, but that is a fool’s choice. There are better options if we have the will to find them.

  • There is a lot of information about COVID-19 out there, much of it misleading. When looking at the future, start with what the science really says.

  • If someone can’t tell you how they would know that they are wrong, they don’t have a clue whether they are right.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

  • Once seemingly incomprehensible, the origin of life no longer seems such a mystery. Most of what once appeared as roadblocks are turning out to be superhighways.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

Over his 30 year career as an internationally known astrophysicist, Dr. Jeff Hester was a key member of the team that repaired the Hubble Space Telescope. With one foot always on the frontiers of knowledge, he has been mentor, coach, team leader, award-winning teacher, administrator and speaker, to name a few of the hats he has worn. His Hubble image, the Pillars of Creation, was chosen by Time Magazine as among the 100 most influential photographs in history.
©Dr. Jeff Hester LLC, 5301 S. Superstition Mountain Dr., Suite 104 #171, Gold Canyon, AZ 85118