Dune Is One of the Most Scientifically Inaccurate Sci-fis of All Time

I've been touched by all your comments since my  last video. I'll give a full update next video, but for now one more time: thank you all so much. If you're anything like me, you've  been impatiently waiting for Dune: Part 2 since they announced it a  couple of years ago.

I saw it in the cinema the other day, and let  me tell you, it did NOT disappoint. In case you aren't familiar with the  Dune universe, here's a quick run-down. Dune is a book series written in  the mid-1960s by Frank Herbert.

It's regarded by many as one of the best works  of science fiction of all time. The first book alone is almost 900 pages long, which  has since been made into a two-part movie. The Dune universe is incredibly rich in  scientific concepts like interstellar travel, personal shields based on subatomic particles,  human adaptation to incredibly harsh environments, moons that tilt the rotational axis  of their planets, and so much more.

It got me thinking - how realistic are these  ideas? Are they really just science fiction, or somewhere within the realm of possibility? I'm Alex McColgan, and you're watching Astrum. 

Join me today as we dive into Dune, to uncover how much this pioneering work of science fiction  stacks up as science, and how much as fiction. Dune revolves heavily around the use of  interstellar, faster-than-light travel. Which is necessary, given the story spans  several different worlds and galaxies.

In fact, the author himself notes in an Appendix that there  are over 13,000 planets in the Dune universe. That's a lot of planets. So let’s focus on the  main three - Geidi Prime, Caladan and Arrakis.

Geidi Prime is home to the Harkonnen,  the current stewards of Arrakis and its resources (which we'll get to later in the  video). It's a highly industrialized world, where little photosynthesis occurs, meaning  they would probably be dependent on trade with other worlds for their food needs.  They've replaced almost all natural things with built environments, except for  a sliver of forest maintained for logging.

Caladan, by contrast, is a lush oceanic world,  home of the Atreides and our main character, Paul. Water is abundant and  the weather is pretty mild. Both these worlds couldn't be more  different from Arrakis - where most of the action happens in the  movie.

Let's take a closer look. Arrakis is a desert world that makes the  Sahara look like an oasis. It is the third planet from its sun, Canopus, orbiting at  a mean distance of 87 million km.

That's about twice as close as our Earth is from our  sun. If we were that close, it would be pretty hard for life to exist, given the searing  hot temperatures and ultra-high radiation. So can Arrakis support human life?

Well,  it’s possible Herbert drew inspiration from an actual star called Canopus, a white  star in the southern constellation of Carina. At the moment this star is in its blue-loop  phase of stellar evolution where it changes from a cool star to a hotter one before  cooling again. Meaning at times Canopus could have been considerably cooler and  dimmer than many yellow dwarfs stars, like our sun.

This would have positioned Arrrakis  in the sweet spot of its star’s Goldilocks Zone at some point during its stellar cycle making  conditions more suitable for supporting life. Something I think is super interesting  about Arrakis is its orbit. Just like Earth, Arrakis sits third in line from its star  - but that's where the similarities end.

On either side of Arrakis are two much  larger planets known as "the twins". Thanks to the dedicated fans over on  the Dune Fandom Wiki pages, who have accumulated an extensive amount of information  about the Dune universe, we know the twins have elliptical orbits. These orbits pull Arrakis into  a gravitational tug-of-war, which causes shifting and changing Arrakis's orbital pattern.

A year on  Arrakis can range from 295 - 595 standard days. I wondered if we'd ever seen an example of  something similar in the known universe. Turns out, highly elliptical orbits are not  so uncommon.

We've discovered quite a few exoplanets that follow this pattern. We also know  that highly eccentric orbits can influence the orbit of nearby planetary bodies within the same  system, such as a change in orbital inclination, shifts in the orbital period, or even orbital  resonance. However, I think the kind of drastic variation we see on Arrakis is highly unlikely  in our universe because it would require very specific unstable and chaotic conditions to exist. 

Even then, the scenario would be short-lived. Speaking of orbits, Arrakis also has  a couple of moons worth mentioning. Krelln and Arvon are both visible in the Arrakis  night sky.

Krelln, the larger of the two, shares a lot of characteristics with  our own moon. It orbits every 25. 5 days, is covered in a thin layer of meteoric dust,  is speckled by craters, and has no atmosphere.

Avon is much smaller and  completes an orbit every 5. 7 days. While the Twins affect the  length of the year on Arrakis, these moons affect the length of the day  by influencing how fast Arrakis rotates about its own axis.

The average day is  about 22. 5 standard hours long, however, under special circumstances, the day can be as  short as 3. 8 hours and as long as 51.

4 hours. Based on what we know about astrophysics,  this kind of scenario seems highly improbable. Planetary rotation is mainly determined  by the conservation of angular momentum.

It's pretty hard to change this momentum  without an external force being applied. Technically, the moons' gravities  would be an external force, but it is improbable that alone would be  enough to cause such strong fluctuations in Arrakis's rotation. Similar to the  dynamic between Arrakis and the Twins, this configuration would also likely be  highly unstable and short-lived in practice.

Let's move on to two of the biggest sci-fi  tropes these films deal with - force fields and interstellar travel. In the Dune Universe, both  of these technologies hinge on the same fictional principle, known as the Holtzman Effect.  I won't go into too much detail about it, but it basically has to do with the supposed  repellant properties of subatomic particles.

Let's start with the force fields, which  take shape as personal shields in the film. We see lots of different characters  using these shields during combat. They're generated around the  wearer by the Holtzman Effect, creating a defensive barrier that is  impenetrable to fast-moving objects like bullets.

Slower-moving objects like a blade,  for example, can still penetrate the shield. Scientists have made numerous -  mostly unsuccessful - attempts at creating force fields or invisible  shields in real life. Most have so far focused on electromagnetism and plasma. 

We haven't looked at subatomic methods yet, so for now, this will have to  remain in the realm of fiction. I'm also not sure of the scientific reason why  a subatomic force field would protect its user from fast objects but not slow ones. Perhaps  it was simply to move the plot along or to introduce more tantalizing fight scenes.

If the  Dune force fields worked against everything, there would be no place for epic hand-to-hand  combat - and wouldn't that be a shame! This aside, the shields themselves  are obviously way beyond our current technological capabilities. We are only just  starting to understand how subatomic particles like bosons and quarks work - and so far, they  seem to be incredibly difficult to predict.

Even if we could predict them, it's unclear how they'd interact with matter to produce the  protective barrier we see in the films. And then there's the issue of conservation  of energy. The energy from the fast-moving objects that are repelled by the shield must  go somewhere.

You'd expect some kind of change to the shield, whether kinetic or thermal.  The shields in the movies light up when hit, but it is unclear how the Holtzman effect  turns kinetic energy into heat and then light. The other major application of the never-explained  Holtzman effect is "space folding" - a key component of interstellar travel along with  the spice, which we'll get to in a second.

With the help of a Holtzman generator, space  navigators known as the Guild Navigators can literally fold space, allowing spacecraft  to travel faster than the speed of light. Right off the bat, we know nothing can surpass the speed of light without violating the  known laws of physics. There are a few main reasons for this, and they boil  down to Einstein's theory of relativity.

Firstly, as a starship accelerates,  time will begin to dilate relative to a stationary observer. As they approach the  speed of light, time would effectively stand still for the crew. Travelling faster than  light, then, implies some kind of negative time.

And it's in going down this rabbit hole  that we end up with things like the Grandfather paradox and other time loop paradoxes  we've discussed before on this channel. Secondly, a starship approaching the speed  of light will also approach infinite mass, meaning you'd need infinite energy to  accelerate past that speed. What the source of that energy would be is unclear.

But from the  way director Villeneuve portrays it in the film, it seems the ships somehow fold space  - perhaps with a wormhole - to arrive at their destination in no time at  all. We've already discussed the science of wormholes in our analysis of  Interstellar, which you can watch here. The second half of the interstellar travel  equation is a mystical blue powder known as "the spice".

It has incredible  economic and political importance in the Dune Universe because, without it,  interstellar travel would be impossible. The only place you can find this spice is  Arrakis. It facilitates interstellar travel by eliciting its effects on the pilots, not the  actual starships themselves.

Let me explain. The spice imparts some pretty crazy effects to the  person who consumes it. To the indigenous people of Arrakis, known as the Fremen, it is considered  sacred.

It has very strong anti-aging properties and helps you achieve a state of prescience  by expanding your consciousness and enabling you to see the future. However, it is also crazy  addictive, and withdrawal from it will kill you. The Guild Navigators take this spice when  piloting a starship to help them achieve that state of heightened awareness.

The precognitive  effects allow them to successfully navigate folded space and safely guide starships  across interstellar space instantaneously. Now, we obviously don't know of any substance that  can help us see into the future, otherwise the entire gambling industry would collapse overnight.  But that would be the least of my concerns.

Seeing into the future implies knowledge of events  before they occur, which violates the laws of causality. The effect must follow the cause,  not the other way around. With precognition, you get paradoxes like time loops.

It  also violates the law of information conservation which says no new information can  be created or destroyed in a closed system. The closest thing to the spice that might  come to mind are psychedelic substances, which humans all over the world have used to  connect with heightened states of consciousness for millennia. These psychoactive plants  are also held as sacred by the indigenous people who use them, just like the spice  is seen as sacred by the Fremen of Arrakis.

That being said, there's no  way eating a magic mushroom on a spaceship will make it reach the speed of light. Another sacred substance on Arrakis is water. The planet is a total desert, without  any natural precipitation or surface water bodies.

The only water the Fremen have  access to is stored in underground wells, which they don't dare to use, because they dream  to one day use this water to terraform Arrakis, make it more hospitable, and reclaim  their power from the oppressive Empire. The only other water source they have  are the byproducts of their own bodily processes. As you can imagine, this has led to  some pretty hardcore water recycling practices.

You definitely noticed the full-body suits  the Fremen put on whenever they venture out of their underground communities. They're known  as Stillsuits, and are designed to capture and recycle as much bodily water as possible.  They filter sweat, blood, urine, and any other secretions through a series of microdermal  layers.

Once the water is separated, it goes to a collection pocket. The Fremen then drink this  water through a tube, kind of like a Camel Pack. It sounds disgusting but also intriguing.

How  would that work if we tried to build a Stillsuit? First off, we'd need a material that can filter  things at the microscopic level to separate waste from water. This actually exists - it is  known as a nanoporous membrane, and it is made of nanopores so small, they only allow water to  filter through.

Everything else that is too big, like bacteria, will be held back. On Earth, these  membranes are made from a mix of materials that sadly would be hard to come by on Arrakis  - namely metals, ceramics, and polymers. The second big hurdle I see to these suits  is keeping them hygienic.

Turns out there are a few different ways to clean  and maintain nanoporous membranes, but only two of them seem plausible on Arrakis  - the Fremen would either need to dry-scrub their Stillsuits with brushes, or apply air  pressure through some kind of hand-held pump. While it is theoretically plausible for us  to use our existing technologies to make a very basic version of something like  this, I doubt many people beyond maybe Bear Grylls and other extreme survival  experts, would be up for trying it out. With Arrakis being a desert planet,  there's not that much in the way of alien life forms to discuss.

However,  there is one very impressive creature, that seems too big to be true: The Sandworm. First off, how could a creature that big survive without much to eat in the desert? Well, you might be familiar with a similarly large creature here on Earth that  has found a solution to this problem.

Apparently, sandworms feed kind of  like blue whales. They guzzle huge amounts of desert sand and filter out the  microscopic sand plankton living there. Ok, but does the math add up?

Blue whales eat anywhere from 1 to 4 tons of plankton per day during the  summer feeding season. They are about 25m in length and only feed in arctic waters  which make up 1. 3% of total ocean water.

Not accounting for differences in metabolism,  a 200m long sand worm feeding at the same rate would need about 8 - 35 tons of sand plankton  per day. That's a huge number. But if you consider that they have 100% of the planet's  surface to feed, compared to the whale's 1.

3%, I guess they could sustain themselves like that. They don't rely on water to live though, and I'm not aware of a single organism,  even the most hardy extremophile, that doesn't rely on water in some capacity to survive. Speaking of water, let's talk about terraforming Arrakis.

One big goal the Fremen have is to  turn at least parts of Arrakis into a lush, green, and more hospitable world. That's  why their underground wells are so precious to them. Any kind of terraforming  would have to start with water.

What I'm about to say isn't shown in either  film, but it is a spoiler from the books, so if you are planning to, or are already  reading them, you might want to skip this part. Several thousand years in the future from when  the movies are set, Arrakis is indeed successfully terraformed by the ruling powers. I couldn't find  much about how this was done, but that didn't stop me from coming up with some ideas of my own.

Terraforming a pure desert into a temperate climate is a super ambitious undertaking,  limited mostly by time. It isn't a project you could do in a lifetime. Luckily for the people of  Arrakis, the spice serves as a fountain of youth, so the time constraint is not such an issue.

It makes me think of similar ideas we've had here on Earth about terraforming Mars, including NASA's  software system architect Casey Handmer's idea to send a fleet of solar sails to Mars to sublimate  the planet's frozen carbon dioxide and thicken the atmosphere. Another, slightly less delicate,  suggestion put forward by Elon Musk is to drop ten thousand nuclear bombs on the polar ice  caps to release carbon dioxide and water vapor. Thickening the atmosphere would warm the planet  to more Earth-like temperatures, but scientists still don't agree whether there is enough frozen  carbon dioxide on Mars for this approach to work.

The atmosphere on Arrakis is already Earth-like.  To kickstart the terraforming process there, I’m assuming you'd need to import water from  other planets. Other things to consider include soil quality, climate modification, ecosystem  restoration, and overall climactic stability.

You'd also have to introduce species to build  and maintain varied and resilient ecosystems, which is something the Emperor at the time  of Arrakis's terraforming did actually do. In my opinion, Dune really stacks up to its  reputation as a pioneer of the sci-fi genre. It's got everything you could want - multiple  worlds, interstellar travel, force fields, weird alien creatures, and mystical powders  with seemingly magical properties.

Dune was never meant to be scientifically  accurate. It really puts the fiction in science fiction, and encourages us  to use our imaginations. Fictional universes give us an opportunity to  explore what we do and don't yet know, deepen our understanding of physics, and get a  sense of where the current limits of science lie.

As Albert Einstein himself said, "Imagination  is more important than knowledge. Knowledge is limited, whereas imagination embraces  the entire world, stimulating progress, and giving birth to evolution. " And that  makes sci-fis like Dune worth keeping around.

As I prepared for this video, a lot of the  legwork was done through careful and conscientious thinking. I’m a big believer in the power we have  to realise things if we spend enough time thinking about them. This doesn’t just apply to scientific  studies, but was also relevant in my personal life.

There have been times for me where life has  been hard, and stress and anxiety has crept up on me. But in those times, seeing my circumstances  in a different light has often made all the difference. That’s why I’m a big believer in the  concept offered in paid partnership with today’s video, BetterHelp.

BetterHelp’s online platform can match  you up to a therapist in usually no more than 48 hours, and therapists are experts at helping  you think about things. That might seem scary, but I’ve really seen the benefits of understanding  the underlying fears that we can carry that influence our day to day in negative ways. Seeing  ourselves in a new light can be lifechanging, and I heartily recommend it.

If you want to see  if therapy is something that might help you, why not give BetterHelp a try by scanning my QR  code or by clicking my link betterhelp. com/astrum You’ll get a therapist’s helpful, unbiased  advice at a 10% discount on your first month. Thanks for watching!

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I'll see you next time.