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The Cosmic Codex

The Cosmic Codex

Written by: Brian Scott Pauls
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Living in a science fiction universe...

www.thecosmiccodex.comBrian Scott Pauls Art Science Fiction
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  • What in the worlds is dark matter?

    What in the worlds is dark matter?
    Sep 13 2026
    Do you or someone you know need professional tech guidance for your author, coaching, or independent publishing business? If so, check out our sponsor Cloudessy, providing fractional Chief Technology Officer services. Simplify your tech stack, prevent launch failures, and build systems that actually support growth.https://marketing.cloudessy.com/30-minute-tech-stack-update/Five-sixths of the matter in the universe is a mystery to us. Now, we might have taken a step closer to figuring out what it is. Maybe.On September 1, the team running the LUX-ZEPLIN (LZ) experiment searching for dark matter reported a development at a conference in Tendo, Japan. Nearly a mile underground in an old South Dakota gold mine, the team watches a tank containing ten tons of ultra-pure liquid xenon. Going through 220 days of data collected in 2023 and 2024, they found a flash of light—the signature of a xenon nucleus recoiling with 248 kiloelectronvolts of energy it picked up from a source no known background phenomenon explains. They calculated the significance of the event at 2.6 sigma—meaning the background would throw off an event like this roughly once in two hundred tries. That isn't enough to call the detection a "discovery," which typically requires five sigma or higher. They didn’t claim to have seen direct evidence of dark matter. But they saw something interesting.1If LZ, or another experiment, repeats this finding, it could have major ramifications for astrophysics and cosmology. Dark matter out-masses all the rest of the matter in our universe at a ratio of about five to one,2 and yet we don’t know what it is.In 1933, Swiss astronomer Fritz Zwicky determined the galaxies in the Coma cluster were moving too fast for the cluster’s visible mass to hold them together. Something else—he called it dunkle Materie3—had to be supplying the necessary gravity. The astronomy community basically ignored his finding for 40 years.4 Then in 1970, Vera Rubin and Kent Ford measured how fast the outer regions of the Andromeda galaxy rotate and found the same problem—the edges were turning nearly as fast as the middle, which Newtonian gravity flatly forbids unless the galaxy’s mass is distributed in ways that don’t match what our instruments detect.5Fast-forward to 2006, when a team led by Douglas Clowe mapped a pair of galaxy clusters caught mid-collision. The gas in the clusters—which is where nearly all the ordinary matter lives—had piled up in the middle, slowed by the impact. But gravitational lensing showed the center-of-mass to be separated from the center of the gas by a significance of eight sigma. They called their paper: “A Direct Empirical Proof of the Existence of Dark Matter.”6The cosmic microwave background provides additional confirmation. The Planck satellite’s measurements fix cold dark matter at roughly five times the density of ordinary matter. Everything we can identify—gas, planets, nebulae, stars, galaxies, quasars, etc.—amounts to about a sixth of the material universe.7 Everything else is invisible and intangible, detectable to us only by its gravity.So, what is it?Maybe it’s not invisible, just really hard to see…Before we dive into speculative explanations, let’s address the simplest possibility. Perhaps dark matter isn’t really exotic; it’s just faint—burnt-out stars, drifting planets, stray black holes. These are often called massive compact halo objects (MACHOs). Anything dense enough passing in front of a background star will briefly brighten it by gravitational lensing, so the idea is directly testable.8The EROS-2 survey watched millions of stars in the Magellanic Clouds for 6.7 years. If the Milky Way’s halo were made of objects around four-tenths of a solar mass, roughly 39 lensing events should have shown up in the bright-star sample—only one did.9 The cosmic microwave background and Big Bang nucleosynthesis independently cap the total amount of ordinary matter far below what the galaxies' gravity demands—no matter how faint that matter might be.10Whatever holds the galaxies together, it isn’t made of the same stuff we are.Science fiction is on the case. Three novels in particular—Mike Brotherton’s Spider Star, John Gribbin’s The Alice Encounter, and Stephen Baxter’s Ring—each take a different approach to dramatizing the problem.WIMPs to the rescue?If dark matter isn’t just ordinary matter that’s hard to see, maybe it’s a particle no one has found yet.The favorite candidates for decades have been “weakly interacting massive particles” (WIMPs)—hypothesized to be heavy, stable particles produced in abundance in the early universe and left over when the cosmos thinned out.11 But we’ve hunted for a long time and nothing suitable has turned up.LZ published its low-mass results last December, based on 417 live days—the largest dataset any dark matter detector has ever assembled—and found nothing between three and nine ...
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    39 mins
  • John Scalzi’s Old Man’s War series wins the Hugo

    John Scalzi’s Old Man’s War series wins the Hugo
    Sep 3 2026
    Do you or someone you know need professional tech guidance for your author, coaching, or independent publishing business? If so, check out our sponsor Cloudessy, providing fractional Chief Technology Officer services. Simplify your tech stack, prevent launch failures, and build systems that actually support growth.https://marketing.cloudessy.com/30-minute-tech-stack-update/Greg Bear Birthday Humble Bundle:https://www.humblebundle.com/books/greg-bear-birthday-bundle-open-road-media-books?hmb_source=&hmb_medium=product_tile&hmb_campaign=mosaic_section_1_layout_index_3_layout_type_threes_tile_index_1_c_gregbearbirthdaybundleopenroadmedia_bookbundle&_gl=1*2thjm5*_up*MQ..*_gs*MQ..&gclid=CjwKCAjwwL_UBhAjEiwAEhuT5J6I3YtOIs2Ik9j35W4nlkDiNJBpz19T17oP3Hy94Vx6r4klmG_ZwhoCdIEQAvD_BwE&gbraid=0AAAAACzVokDVr7jJ6gZ2jgVi7LtdRGu3qby Brian Scott PaulsThis past Sunday, the World Science Fiction Society presented the Hugo Awards at LAcon V in Anaheim—the 84th Worldcon. Fantasy continued to dominate the novel categories, with one big exception. John Scalzi won the Hugo Award for Best Series with his seven (to date) novels in the Old Man’s War cycle. Tor published the first book, Old Man’s War, in 2005, and the most recent, The Shattering Peace, in 2025.1Just a reminder that Cloudessy, my consulting business providing fractional Chief Technology Officer services, is now a sponsor of this newsletter. If you or someone you know needs professional tech guidance for their author, coaching, or independent publishing business, check out the ad at the end of this post. Thank you!Born in 1969 in Fairfield, California, Scalzi received an AB in philosophy from the University of Chicago, where he edited the student paper and freelanced for the Chicago Sun-Times.2 In the nineties he worked as a film critic and opinion columnist at the Fresno Bee, then two years as an in-house writer and editor at AOL.3 In September 1998 he started his blog Whatever, still active today.4Scalzi discovered the value of “shareware” marketing early on. In 1997 he wrote Agent to the Stars as an experiment, to see if he could handle writing at novel-length. In 1999 he posted it for free on his website, asking readers to mail him a dollar if they liked it. By 2004 he’d received about $4000 from satisfied fans.5Learning from this experience, Scalzi serialized Old Man’s War on the blog in 2002.6 Then he sent Tor editor Patrick Nielsen Hayden a link to an essay he’d written about the experiment. Two days later, Nielsen Hayden replied, “as the blurb cliché goes, I couldn’t put it down.” Tor published the book in 2005. The next year it received a Hugo nomination for Best Novel and won the John W. Campbell (now Astounding) Award for Best New Writer.7The Best Series win is Scalzi’s fourth Hugo, following Best Fan Writer in 2008, Best Related Book in 2009 for Your Hate Mail Will Be Graded, and Best Novel in 2013 for Redshirts.8 In 2015 Tor signed him to a thirteen book contract over ten years.9Scalzi lives with his wife in Bradford, Ohio.10See below for the description of Old Man’s War, the first novel in the series, from the publisher’s website:"John Perry did two things on his 75th birthday. First he visited his wife’s grave. Then he joined the army.The good news is that humanity finally made it to the stars. The bad news is that, out there, planets fit to live on are scarce—and alien races willing to fight us for them are common. So: we fight. Far from Earth, the war has been going on for decades: brutal, bloody, unyielding.Responsible for protecting humanity, the Colonial Defense Force doesn’t want young people; they want people who carry the knowledge and skills of decades of living. You’ll be taken off Earth, never to return. You’ll serve two years in combat. And if you survive, you’ll be given a homestead of your own on a hard-won planet light-years from home.John Perry is taking that deal. He thinks he knows what to expect. But the actual fight is far, far harder than he can imagine—and what he will become is far stranger.11" This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit www.thecosmiccodex.com
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    21 mins
  • A critique of Adrian Tchaikovsky’s “Children of Time”

    A critique of Adrian Tchaikovsky’s “Children of Time”
    Aug 27 2026
    Do you or someone you know need professional tech guidance for your author, coaching, or independent publishing business? If so, check out our sponsor Cloudessy, providing fractional Chief Technology Officer services. Simplify your tech stack, prevent launch failures, and build systems that actually support growth.https://marketing.cloudessy.com/30-minute-tech-stack-update/Stream the Hugo Awards Ceremony 2026:https://www.youtube.com/@lacon-onlineGreg Bear Birthday Humble Bundle:https://www.humblebundle.com/books/greg-bear-birthday-bundle-open-road-media-books?hmb_source=&hmb_medium=product_tile&hmb_campaign=mosaic_section_1_layout_index_3_layout_type_threes_tile_index_1_c_gregbearbirthdaybundleopenroadmedia_bookbundle&_gl=1*2thjm5*_up*MQ..*_gs*MQ..&gclid=CjwKCAjwwL_UBhAjEiwAEhuT5J6I3YtOIs2Ik9j35W4nlkDiNJBpz19T17oP3Hy94Vx6r4klmG_ZwhoCdIEQAvD_BwE&gbraid=0AAAAACzVokDVr7jJ6gZ2jgVi7LtdRGu3qby Brian Scott PaulsIf you put Andre Norton’s “The Stars Are Ours,” Robert A. Heinlein’s “Orphans of the Sky,” Frank Herbert’s “Dune,” David Brin’s “The Uplift War,” and Vernor Vinge’s “A Deepness In the Sky” in a blender on ‘high,’ you might get something like Adrian Tchaikovsky’s “Children of Time.” This is a description, not a criticism.“Immature poets imitate;” Eliot tells us, “mature poets steal...” Refugees from a ruined Earth escaping to the stars, a generation ship fallen into savagery, an epic sweep of future history, terrestrial species uplifted to sentience, even a culture of intelligent, spider-like “aliens”—none of this is new. After more than a century of genre science fiction, new ideas are rare. But Eliot also said “…bad poets deface what they take, and good poets make it into something better, or at least something different.” Tchaikovsky isn’t necessarily better than Norton, Heinlein, Herbert, Brin, and Vinge, but without a doubt he gives us a unique and memorable combination of these elements.In 2023, Tchaikovsky’s Children of Time series won the Hugo Award for Best Series, and this first book won the Arthur C. Clarke Award in 2016. I’ll review the following volumes, Children of Ruin and Children of Memory, over the next two months.Also, please remember Cloudessy, my consulting business providing fractional Chief Technology Officer services, is now a sponsor of this newsletter. If you or someone you know needs professional tech guidance for their author, coaching, or independent publishing business, check out the ad at the end of this post. Thank you!Thanks for reading The Cosmic Codex! Subscribe for free to receive new posts and support my work.Children of Time begins with Dr. Avrana Kern’s plan to seed a terraformed world with monkeys, along with a nanovirus meant to accelerate their evolution. When a sabotage attack kills the monkeys, the nanovirus escapes and infects other species already on the planet, including a population of Portia labiata (“jumping spiders”.) Kern survives in suspended animation emerging at long intervals to watch over the world below.Thousands of years later, the ark ship Gilgamesh approaches the planet after fleeing a ruined Earth. This results in a confrontation with Kern, now psychologically unstable after long isolation, who is unwilling to share “her” world with the unexpected and unwelcome refugees.Tchaikovsky structures Children of Time in a back-and-forth narrative which compares and contrasts the gradual development of the “Portiid’s” spider civilization with the technological and cultural decline of the humans on their decaying starship. Of the two, the Portiids are the most fascinating.Trained in psychology and zoology, Tchaikovsky is at his scientific strongest when depicting how arthropod-type species think and behave. The real life Portia labiata ranks among the most cognitively studied arthropods. Experiments have documented specimens selecting routes before moving, executing detours that carry them out of sight of their prey, and adjusting their tactics against spitting spiders of the genus Scytodes. From this framework, Tchaikovsky constructs a believable, and (which is more important here) a believably non-human society that nevertheless piques our curiosity and sympathy.The Portiids even develop biotechnology allowing them to build computers out of ants:Each colony has been carefully trained, by subtle manipulation of punishment, reward and chemical stimulus, to perform a specific service, giving the great minds of the spiders access to a curious kind of analytical engine, using the cascading decision trees of the colony’s own governance as gearing. Each colony is good for a very limited set of related calculations—a vastly skilled yet vastly specialized idiot savant—and retraining a community of ants is a long and painstaking task.Tchaikovsky goes to great lengths constructing a new species we’ll accept as “real.” And when the Portiids reach orbit, he drops an ...
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    31 mins
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