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MIND MELD: What’s Your Favorite ‘Big Dumb Object’ in SF?

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Big Dumb Objects. Large scale science fiction things that themselves are a character or at least a tangible and inescapable feature of the novel or story. They are part of the fabric of science fiction ranging from E.E. Doc Smith to Peter F Hamilton. So the question for the panelists this week is:

What is your favorite “Big Dumb Object” in Science Fiction? Why?

Here’s what they said…

James Bloomer
James Bloomer has a PhD in particle physics(he studied Tau Leptons at CERN) and has probably forgotten more physics than most people ever learn. He won the 2010 James White Award and the winning story was published in Interzone. He runs the blog Big Dumb Object and you can find him on Twitter @bigdumbobject.

I don’t like the classic BDO’s: the Ringworld from Ringworld and the Rama from Rendezvous With Rama. It may have something to do with the fact that I thought the stories were dull, but I just found them, well, too dumb. Some people found the objects, they wandered around a little bit, then they gave up and left. Not much sense of wonder for me I’m afraid.

The BDO’s that actually generate that required sense of wonder for me are a bit more intelligent. I particularily like stuff from Iain M. Banks Culture universe, like the layered world from Matter or the Culture Orbitals (although I’m not sure they really qualify as BDO’s because they have a very clever mind at their core?)

My favourite BDO however is not fiction at all, despite featuring heavily in Science Fiction: it’s the Universe. Our Universe. It’s a big object and it’s mostly empty, and therefore dumb, inert, silent. It’s mysterious, we’ve spend lifetimes trying to figure it out and will spend lifetimes more. And yet amidst the emptiness we’ve found fantastic things: nebula, super nova, glorious looking galaxies. It’s endless. It’s amazing. We’re living in a BDO!

Gregory Benford
Gregory Benford has published over twenty books, mostly novels. Nearly all remain in print, some after a quarter of a century. His fiction has won many awards, including the Nebula Award for his novel Timescape. A winner of the United Nations Medal for Literature, he is a professor of physics at the University of California, Irvine. He is a Woodrow Wilson Fellow, was Visiting Fellow at Cambridge University, and in 1995 received the Lord Prize for contributions to science. He won the Japan Seiun Award for Dramatic Presentation with his 7-hour series, A Galactic Odyssey.

In sf, a Big Dumb Object (BDO) is any mysterious object that generates an intense sense of wonder just by being there. My fave is the one I’m working on in a two-volume novel I’m writing with Larry Niven. Larry said to me recently, “Big dumb objects are so much easier. Collapsed civilizations are so much easier. Yeah, bring them up to speed.”

Ours appears in the first novel, The Bowl of Heaven, to come out next year. It’s a shell several hundred millions of miles across, held to a star by gravity and some electrodynamics forces. The star produces a long jet of hot gas, which spears through a hole at the crown of the cup-shaped shell. This jet propels the entire system forward – literally, a star turned into the engine of a “ship” that is the shell. On the shell’s inner face, a sprawling civilization dwells. The novel’s structure resembles Larry’s Ringworld, based on the physics worked out by Benford.

The virtue of any BDO is energy and space. The collected solar energy is immense, and the living space beyond comprehension except in numerical terms. But….this smart craft is also going somewhere, and its builders live aboard. Where are they going, and why? That’s the fun of smart objects – they don’t just awe, they intrigue.

David Langford
David Langford, SF critic and editor of Ansible, diarizes at and is also a principal editor of the Encyclopedia of SF‘s third edition: see

Since I like an element of outrageousness in my Big Dumb Objects, I’m strongly tempted to opt for the planet in Christopher Priest’s Inverted World — a hyperboloid which zooms off to infinity at both poles and every point of its equator. The fascinating problem of how this monster avoids intersection with its similarly shaped sun can be circumvented only by $SPOILER, with the unfortunate side-effect of making the Inverted World not in fact a BDO at all. So, after briefly considering the utter just-because-we-could-do-it silliness of the Chain Stars in Terry Pratchett’s The Dark Side of the Sun (two linked toroidal suns), I’ll pick the one-dimensionally infinite Way of Greg Bear’s Eon … an almost cosy tunnel through space/time that happens to go on forever. Though I’d be happier if that nice Mr Bear hadn’t blown it up in the sequel.

All these remain Big Dumb objects, ingeniously constructed by sometimes godlike Builders but not actually sapient. The current editors of the Encyclopedia of SF began to get itchy about the increasing number of Big Smart Objects (usually with built-in AI) being filed under the 1993 edition’s headword BIG DUMB OBJECTS, and — while not dropping that entry entirely — came up with the new headword MACROSTRUCTURES. Which saves a lot of repeated explanation that the BDO now under discussion is not, despite what we just called it, Dumb….

Kristine Kathryn Rusch
Kristine Kathryn Rusch‘s long-anticipated new Retrieval Artist novel, Anniversary Day, will appear in the fall as an Audible exclusive. The print/e-book edition will come out in December, along with a newly packaged version of all of the Retrieval Artist novels. Her next Diving universe novel, Boneyards, will appear in January. The most recent book in that series, City of Ruins, came out in May. Visit her website every Monday for free fiction:

I gave this some thought, and realized I don’t like most of sf’s Big Dumb Objects. I like objects that turn out to have a brain. My favorite, my very favorite, is the Tardis. I love that little beastie. I love that it’s bigger on the inside than it is on the outside. I love that the interior changes all the time. I just adore it. I suppose if I have to choose another, it’s the Starship Enterprise, but that’s mostly because my old pal & hero James Kirk loves it. I have a special fondness for that ship.

Laura Reeve
Laura E. Reeve is the author of the Major Ariane Kedros Novels from Roc. She’s also been a software engineer and a U.S. Air Force Officer, which helped shape her military-flavored science fiction. She currently lives in Monument, CO, with her husband. See more about her worlds at

But there are so many BDOs to pick from! One of my favorites from written SF is Tanya Huff’s “Big Yellow,” a neon-colored BDO discovered at the beginning of her Confederacy novel The Better Part of Valor. What I like about Huff’s story is the sly acknowledgement in the beginning that Big Yellow is, indeed, a plot device. Additionally, Huff’s reconnaissance marines are smart enough to recognize a honeypot when they see one and are suitably suspicious. Big Yellow turns out to be made of gray sentient goo that has an agenda, of course, which drives several more novels in the series. It becomes a character in its own right.

I’ll also mention a favorite BDO from movie SF, which is the moon-sized glob of evil bearing down on Earth in The Fifth Element. This BDO takes the name “Mr. Shadow” and we see him telephone his underling on Earth to speak about his plan. While this isn’t particularly credible (Mr. Shadow obviously previously recruited the underling yet only recently acquired communications equipment, so how were complex plans previously conveyed, etc.), it establishes Mr. Shadow as a character with independent motivation.

Obviously, I love the use of BDO as character. It’s this use that separates Science Fiction’s BDO from “the McGuffin,” used by film directors and mystery writers as a plot device. Sure, they both start the plot rolling, but the McGuffin doesn’t have to be fully explained or even play a part in plot culmination (as Hitchcock said, it’s only important that all the characters desperately want the McGuffin). Since mysteries/thrillers are about uncovering human motivation, the McGuffin is good enough. But Science Fiction is about exploring and expanding human motivation, so our BDO should do more than the McGuffin. That’s why SF authors regularly make the BDO a character and gradually expose its motivation–often in sequels, unfortunately.

S. Andrew Swann
S. Andrew Swann is the pen name of Steven Swiniarski. He’s married and lives in the Greater Cleveland area where he has lived all of his adult life. He has a background in mechanical engineering and -besides writing- works as a Database Manager for one of the largest private child services agencies in the Cleveland area. He has published 23 novels over the past 18 years, which include science fiction, fantasy and horror. His latest SF novel, released by DAW Books this last February, is Messiah, the final volume in his epic space opera, the Apotheosis Trilogy.

Personally, I love the “Big Dumb Object” trope. It is one of the few tools in the SF toolbox that, when used properly, hasn’t been quite dulled by repetition. When the BDO comes on screen, I suspect the sense of wonder it engenders in a modern audience is the same as was felt by readers in the era of Hugo Gernsback. The typical BDO is not just several orders of magnitude beyond the author’s technology and level of understanding, but beyond the characters and cultures in the work where it appears. Ringworld isn’t just amazing to us. It’s amazing to everyone who comes in contact with it.

I’m also pretty partial to the idea of planets as artifacts (or vice-versa), such as the above Ringworld by Larry Niven, or the Riverworld books by Phillip Jose Farmer. Less well known is the planet Patra-Bannk from Tony Rothman’s novel, The World is Round. Though, if I was to take my favorite example of this sub-trope, I would have to pick Earth itself from Douglas Adams’ Hitchhiker’s Guide to the Galaxy.

About Paul Weimer (366 Articles)
Not really a Prince of Amber, but rather an ex-pat New Yorker that has found himself living in Minnesota, Paul Weimer has been reading SF and Fantasy for over 30 years and exploring the world of roleplaying games for over 25 years. Almost as long as he has been reading and watching movies, he has enjoyed telling people what he has thought of them. In addition to SF Signal, he can be found at his own blog, Blog Jvstin Style, Skiffy and Fanty, SFF Audio, Twitter, and many other places on the Internet!

6 Comments on MIND MELD: What’s Your Favorite ‘Big Dumb Object’ in SF?

  1. Colin Kapp’s cageworlds, or Robert Reed’s Great Ship.

  2. R.Bailey // July 13, 2011 at 10:13 am //

    The talking gun in Death’s Head.

  3. I have a fondness for the M’Kraan Crystal in those early X-Men Comics…

  4. Alan Steele’s Hex had a nice one.  I liked it better from the outside though.


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