The Latest on Time Travel. An ironic title for news about weird S**T

All right, this is going to get a bit dense and weird, as we glimpse discussions of time travel.  But first... a string of wonderfully interesting bits of science news!

== Is each neuron a quantum computer? ==

The recent discovery of quantum vibrations in microtubules inside brain neurons appears to corroborate claims that consciousness derives from deeper-level, finer-scale activities inside brain neurons. The eminent mathematical physicist Sir Roger Penrose in the 1990s suggested that quantum vibrational computations in microtubules were “orchestrated” (“Orch”) by synaptic inputs and memory stored in microtubules.  They may be the seat of stored information that neurons (and glia exchanges) intermediate.  Moreover, in a new development it is thought that Microtubule quantum vibrations (e.g. in the megahertz frequency range) appear to interfere and produce much slower EEG “beat frequencies.”

In Consciousness in the universe: A review of the 'Orch OR' theory, Penrose and Hameroff suggest, “Consciousness depends on anharmonic vibrations of microtubules inside neurons, similar to certain kinds of Indian music, but unlike Western music, which is harmonic."  

How cool and weird!  Only I am less interested in the mystical implications about roots of consciousness than whether this nails in "intracellular computing" as a major part of brain function. 

If so, then that boosts by many orders of magnitude how many transactions take place to comprise our minds.  And many more Moore's Law doublings will be needed before that number can be replicated, in silicon.

Is that good news or bad news?  Will this delay the arrival of friendly machines who will solve our problems and help us become better, too?  Or will it save us from the imminent arrival of Terminator/Skynet, giving us time to ponder how to do these things right, as physicist Max Tegmark proposes in his article, Humanity in Jeopardy on the Kurzweil site -- as well as his book, Our Mathematical Universe.

Where are we headed? These tradeoffs are discussed by Erik Brynjolfsson and Andrew McAfee in their new book, The Second Machine Age: Work, Progress, and Prosperity in a Time of Brilliant Technologies.

And, of course, well… I explore them pretty extensively, too. See my earlier posting: Could Our Universe Be a Fake?

== Why Glass is so limited? ==

What are the design tradeoffs in delivering actual immersive augmented reality glasses, of the sort I called "tru-vu goggles" in EARTH (1989)? Google Glass finesses the problem with a very narrow angle of view, offset from straight-ahead.  In this article you can see some of the problems… and how a new company has come up with clever ways to solve them.

At Google last week, I described to Head of Research Peter Norvig the reasons why I thought Google was keeping Glass simple, and not covering the user's visual field, or offering face recog features.  He said yep. The company with big pockets cannot afford to be the first to offer full Augmented Reality.  Not when the first ten years will be (as I describe in fiction) filled with accidents and lawsuits.

== What I learned while visiting tomorrow ==

All right then…  David Deutsch, a pioneer of quantum computing and a physicist at Oxford -- as well as the author of The Beginning of Infinity -- came up with a simplified model of time travel to deal with the Grandfather paradox*.  He solved the paradox originally using a slight change to quantum theory, proposing that you could change the past as long as you did so in a self-consistent manner.

“Meaning that, if you kill your grandfather, you do it with only probability one-half,” said PRL co-author Mark Wilde, an LSU assistant professor. “Then, he’s dead with probability one-half, and you are not born with probability one-half, but the opposite is a fair chance. You could have existed with probability one-half to go back and kill your grandfather.”

The original article cited here maintains that, to be consistent with Deutsch’s model, which holds that you can only change the past as long as you can do it in a self-consistent manner, Wilde and colleagues had to come up with a solution that would allow for a looping curve back in time, and copying of quantum data based on a time traveling particle, without disturbing the past.

“That was the major breakthrough, to figure out what could happen at the beginning of this time loop to enable us to effectively read out many copies of the data without disturbing the past,” Wilde said. “It just worked.”

“If an adversary, if a malicious person, were to have access to these time loops, then they could break the security of quantum key distribution,” Wilde said. “That’s one way of interpreting it. But it’s a very strong practical implication because the big push of quantum communication is this secure way of communicating. We believe that this is the strongest form of encryption that is out there because it’s based on physical principles.”Such encryption is believed to be unbreakable — that is, as long as hackers don’t have access to Wilde’s looping closed timelike curves.

=== So?  Are we being visited from the future? ===

In a recent paper, Robert J. Nemiroff and Teresa Wilson, suggest that we actually search for time travelers… via Internet searches, by seeking a prescient mention of information not previously available. Their first search covered prescient content placed on the Internet, highlighted by a comprehensive search for specific terms in tweets on Twitter. The second search examined prescient inquiries submitted to a search engine.  Whereupon, lo and behold… "no time travelers were discovered." Although these negative results do not disprove time travel, given the great reach of the Internet, this search is perhaps the most comprehensive to date.

Well, well, didn't the authors kind of assume that the time travelers either want to be found or else that - when back home in the future - they failed to do a web search for traps like the one laid by Nemiroff and Wilson?

It reminds me of the "Invitation to Extra-Terrestrial Intelligences" that was issued on the internet by the late professor Allan Tough, who felt certain that mechanical envoy-lurkers -- waiting in the asteroid belt for millions of years -- had already inveigled their way into our networks to read our web pages. (And much more? Are there NSAliens out there?)  Further that they were only awaiting an invitation to speak up and announce themselves.  Allan was brave enough to invite me to post my own variant (deviant?) invitation… or else decryption of why lurkers might refrain and just keep lurking.

All the same logics apply to time travelers, I'm afraid.  Oh, that invitation of mine to lurkers?  It became a number of chapters in Existence!

For an exploration of time travel scenarios in science fiction, see an extensive list of Time Travel in Fiction, or the more recent anthology The Mammoth Book of Time Travel SF, with short stories by Silverberg, Rusch, Levinson, Swanwick, Priest and others.

== And finally ==

Two newly discovered species of spider -- in far-apart Peru and the Philippines -- make decoy spiders to place on their webs, each one about the size of a half-dollar, constructed from debris and food carcasses, with eight legs radiating from its bulky center. The tiny sculptor dwells inside her creation.

Batteries will be vital in the new world of dispersed and sustainable power systems. The prospect of low-cost storage has long been a nirvana for the renewable energy industry with the intermittent nature of wind and solar energy restraining their competitiveness against fossil fuels such as coal.  Now researchers have found ways to use cheap/abundant materials in Flow Batteries.

Coolest commercial mini-drone I've seen so far.

Abbot & Costello hilariously do math

Re-Evaluating All We Know?

First an announcement: I’ll be speaking at the Singularity Summit in New York City October 15-16, along with Ray Kurzweil, Peter Thiel, Stephen Wolfram, Michael Shermer, John Mauldin, Eliezer Yudkowsky, Jason Silva and many others. My topic: “So you want to make gods. Now why should that bother anybody?”  

Our can-do, problem-solving zeal may save humanity and light up the galaxy. Yet, talk of “tech-transcendence” inspires some – and worries others. What can we learn from the past about our future? This will be a stupendous conference. Sign up to attend!

== Can Science Re-Evaluate? ==

The physics world is buzzing over the recent faster than light particle result from CERN - one of those science stories that gets a lot of public press. Apparently, some neutrinos emitted by the great accelerator in the Alps are showing up in an Italian detector a nanosecond or so earlier than relativity ought to allow.

If the result is verified it will prove a major milestone. Among possible explanations might be that super-energetic neutrinos are bumped (very briefly) out of the four dimensional "brane" we call spacetime. (Envision separated membranes like soap bubbles; one film is our universe.) Hauled back in by gravity (the only force that carries between branes), they re-enter our world a bit farther along their old trajectory. Enough (some suggest) to explain the apparent cheating of ol' Einstein. No, I ain't pulling your leg. There are brainy guys who ponder such stuff. And if this, or some other exotic explanation, pans out then we're in for interesting times!

But dig it, please -- extraordinary claims call for extraordinary (and reproducible) evidence. One of the great things about our civilization is we get to see scientists constantly checking, re-checking and poking at whatever Standard Model reigns in their field.  In my life, nearly all of these re-checks have resulted in only minor re-adjustments -- with the exception of the Dark Matter and Dark Energy findings. (Even if they are disproved, it will only be by something else stunning.) Others, like Cold Fusion, caused yearlong investigations and Re-Evaluations of All We Know (REAWK!) but with negative results.

I find it all healthy and look forward to seeing this very competitive truth-finding process apply to the new CERN "FTL" results.  Still, it worries me that many in the press and public take a very unhealthy attitude - that re-appraisal in a branch of science somehow means it had been "all wrong" before.  Some take it as revelation that science is waffling or poorly based... instead of proof of the very opposite.  Others yearn for an upset apple-cart! They see any sign of a re-proved Standard Model as evidence of stodginess or oppression by Old Professors Incapable of Seeing the New (OPISN).

To be clear, I have known plenty of OPISNs! But the incredibly competitive nature of science (Adam Smith would be proud) generally makes them targets of the next wave of bright young guns.

Look, given our heritage as a superstitious species that danced to incantations by campfires, it should be no surprise that many of our neighbors are emotionally out of tune with science, or don't see how its competitive process results in ever-improving models of the world. Models that keep getting better, even when some part of them is shown to have been incomplete, or even wrong. That is how they improve. (Duh?) The ultimate market.

It is only human to perceive a process that you do not understand and judge it by the way your own mind thinks.  But racism was also deeply human. And feudalism. So come. Start by repeating this aloud: "It can be fun to re-evaluate all that I know! Heck, I might even learn something."

There. Don't you feel more scientific already?  Now to make that same spirit work in politics....

Oh... while I'm at it... here’s another paradigm-changing update: Could Dark Energy and even Guth’s “inflation” be overly contrived theories for something more easily explained? By the existence of hyper-long gravitational waves -- left over from the Big Bang?  These might elucidate the recently discovered preferential direction in the cosmos - the so-called “axis of evil.” Plus the revelation that distant-most galaxies seem to be accelerating their velocity of recession from us (thus requiring dark energy to explain the hyper expansion).  The gravitational wave concept makes such cludges unnecessary. Maybe. This paper is certainly worth a read.

== Space Updates ==

Does our solar system exist inside a bubble? Astronomers say we're in a “local bubble” in the interstellar medium – perhaps a result of stellar explosions millions of years ago. (See my cosmological short story about... "Bubbles"!)

Kepler-16b, the first planet known to definitively orbit two stars -- what's called a circumbinary planet. The planet, depicted in foreground, was discovered by NASA's Kepler mission. (Nearly every article has compared it to Tatooine from Star Wars -- so I'll avoid that cliche! Oops too late.... dang Star Wars $%#$#$!)

Similarly cosmic! Anyone with a soul should find this breathtaking! Watch a Saturn fly-by video composed from high-resolution images from the Cassini Orbiter.

Scientists analyzing data from the Kepler spacecraft for exoplanets have encountered a problem: noisy stars! Before Kepler's launch, researchers had assumed that most Sun-like stars would be about as quiet as the Sun, with mild fluctuations in luminosity. Noise in the Kepler data is much larger - much of it variations in the stars themselves. Sunspots and magnetic activity are the most likely culprits – perhaps because about half of the sun-like stars in the Kepler field are younger than expected (Young stars spin faster, with more vigorous magnetic fields.) If this youthful bias is true of the entire Milky Way, it could alter our understanding of how stars are born and die.

Note also... if our sun is older than average, it might help explain the Fermi Paradox.

How would humans survive extended voyages in space? Five men cooped together over a year to simulate a Mars mission... apparently were going stir crazy! Yipe! (Well, look, several are Russian. Jeepers, did you ever read the book or watch the original film SOLARIS? All is explained.)

See the Solar System in action!  Stunning animation of planetary and satellite orbits – set to any date you choose.

== Life, the Universe and Everything ==


How Life arose on Earth, and How a Singularity might bring it down. This Scientific American article reporting about a recent biological conference is worth reading from top to bottom. Caltech cosmologist Sean Carroll opened the meeting by commenting that “The purpose of life is ... to hydrogenate carbon dioxide.” There  you go...

From another talk on the scaling of life: “An organism’s lifespan is proportional to the 1/4 power of its mass, its heart rate goes as the –1/4 power of its mass, so the total number of heart beats is independent of mass—a universal value of about a billion beats for all of us. Use them wisely.” (Except humans get three times that! We’re the Methuselahs of mammals. See my article "So You Want Immortality?")

An interesting and fair discussion of the possibility that dolphins have a sort of language and a sort of “intelligence.”  As a sort-of dolphinish guy, I actually have subtle and complex beliefs about this.  The folks I know who’ve worked with high cetaceans all tell me their impression: that the creatures seem to “wish they were smarter.” Subjective, but poignant and telling. (I’ll discuss dolphin “uplift” further in my next novel, EXISTENCE.)

== And a Few Updates ==

Being Human in the 21^st Century: Again I’ll be speaking at the Singularity Summit in New York City October 15-16, along with Ray Kurzweil, Peter Thiel, Stephen Wolfram, Michael Shermer, John Mauldin, Eliezer Yudkowsky, Jason Silva and many others. My topic: “So you want to make gods. Now why should that bother anybody?”  Come on, sign up!

Oh... I may announce an open fans-n-friends bar session in New York, stay tuned!

OTHER COMING EVENTS: 

I’ll be speaking at TEDx Brussells November 22: A Day in the Deep Future.

New Orleans! I'll be Author Guest of Honor at the Contraflow Science Fiction Convention the weekend of November 4-6.

Also attending the World Fantasy Convention in San Diego.

FANNISH ANNOUNCEMENTS:

One of my classic short stories “Bubbles” is in the latest issue of the fine online sci fi zine LIGHTSPEED!  And Harlan Ellison, my rambunctious pal, is doing an audio reading.  I’m honored.

A cool fan site showcasing my novels! Thanks to Susan O'Fearna.

And from the sublime to the ridiculous... or at least now for something completely different... David Brin playing the harmonica at the Reno World Science Fiction Convention (thanks to Lawrence Person.)