Away until back...

After almost four years of writing posts for this blog it is time for a sabbatical. There are certainly enough subjects left to write about. For instance, there is the issue whether established echolocation can prevent eye evolution taking off (I think not), as well as more on eyes, issues on flight, on camouflage, etc. I find writing posts and interacting with those who react (thank you all!) most enjoyable. It is just there are things I need to take care of, and the blogging batteries need recharging. I do not know when I will resume writing, but a nice time to do so would be sometime around the blog's fourth birthday (that's in April, in case you wonder). That is not a definite promise though.

This does not mean that the Furaha project is in any danger. After 30 years I am not going to drop it now. Far from it, in fact: I intend to devote part of the time I have spent blogging on painting. There's lots of things to do.

As proof that the project is very much alive, I can tell you that Furaha will appear in a film that you can actually see in a cinema. The film is being produced by an independent company and is being shot right now. I cannot say too much about it, but it is not a documentary; it will be about people, right here on Earth, and the Furaha project plays a very interesting role.

The producer recently asked me to make -with two days notice, but such things always seem to work that way- a 3D model of my woolly-haired shuffler, an animal that they had seen in my newspaper interview (here and here). and so I loaded Sculptris, a program I wrote about earlier, and started making one. Sculptris is completely free and a joy to work with. The resulting model is certainly not perfect, but for someone like me with limited experience with digital 3D sculpting programs it did not turn out too bad, I think. Particularly if you consider that this was done in about four hours of time...

Click to enlarge; copyright Gert van Dijk

Here are some screen shots of Sculptris with the model in various colours. It was a bit difficult to get the lateral jaws in there, as Sculptris does not formally accept holes. What i did was to push two extrusions together and then I flattened them where they toch one another. Formally, there are no holes in the model...

Once I had that, it wasn't difficult to export the model to the 'obj' format, import it into Vue Infinite and make a 'turn table animation'. That is what you see above. Not too bad, is it?

With the 'obj' model at hand, I decided to have a better look at a website I had visited before. The site, by the firm 'Shapeways', provides a service through which you upload a 3D computer model, and they then check it, print it in 3D and ship it to you. The instructions on how to check the model and upload it were fairly straightforward, so all was left was to choose a material. You can choose various materials with different qualities, such as the ability to hold detail. I chose a material that promised to allow details and settled for a small size, as you pay for the volume of the material used.

Click to enlarge; copyright Gert van Dijk

The model arrived within in two weeks and looked good. Part of the left maxilla had broken off, not too surprising if you consider how thin it was. The website has lots of information on how to prevent making your models too thin. What I had not foreseen is that the material was transparent, so much of the detail did not show up. I painted it to solve that, and photographed the result. Interesting, isn't it? I was impressed with the details, but would like a larger size next time. You pay for the volume of material that goes into the model, so I will have to learn how to hollow out the model; if I manage that, I should be able to order a much bigger one for the same price.

So, it's off towards the sunset for me, for a while. I intend to keep on replying to questions here and on the Furaha bulletin board in the meantime, so I'm not away altogether.

Furaha in NRC again, but in English this time!

In June of this year, the Dutch newspaper NRC Handelsblad devoted a satisfyingly large section of their science section to the Furaha project. You will find the post on that subject here. As the text was in Dutch, the majority of the readers of this blog were unable to understand it. Mind you, I displayed the images at such a small scale to make it unreadable regardless of language; newspaper texts are not free, after all. But as time passes things change, so I asked Lucas Brouwers, the journalist who wrote the article, whether he would mind if I translated his text into English, and he in turn asked those in charge of such matters at the newspaper whether they would mind having the article republished in this form. The short answer was that no-one minded, so I went ahead and translated it into English. I tried to stay fairly close to the text, but at the same time wished to avoid the stilted style you often get in translations (it is much easier to write directly in a foreign language than it is to translate something from your own language into that language).

Click to enlarge; copyright NRC / Gert van Dijk

Hairy shufflers and radial flyers

BIOLOGY Professor of neurophysiology Gert van Dijk designs the flora and fauna of the fictive planet Furaha in his spare time.

Lucas Brouwers

At first glance the woolly-haired shuffler looks familiar. The animal looks quite a bit like a large mammal. It might just be a close relative of a rhinoceros, or a bison. But a closer look reveals that it is standing on six legs and that its upper jaw has grown into a grotesque shovel. Its more distant relatives are no less odd than the shuffler itself. There are six-legged predators, using their two front legs to knock their prey unconscious with. Or how about water animals, gliding solemnly through the oceans with hardly any moving parts visible from the outside. They are ingeniously designed: a hollow tube runs through their body, displacing water by pulsating continuously.

None of these animals are real. They are creations of Gert van Dijk, professor of neurophysiology in Leiden. In his spare time he designs the flora and fauna of the fictive planet Furaha, home to the woolly-haired shuffler. Van Dijk designed the workings of his planet in minute detail. From the evolution of life on Furaha to the place of the planet and its star in our galaxy: it is all there.

As a student Van Dijk used to paint extraterrestrial scenes for book covers for a publisher of what he now labels as "atrociously poor science fiction" The work did not make him exactly happy." That publisher asked me questions like the following: 'There is an empty corner in your painting; couldn't you fit in an exploding planet there?' ", he recollects.

Van Dijk therefore decided to start painting for his own pleasure. The first painting showing life on Furaha dates from 1979. It showed an exotic tree with an odd four-winged beast. That was only the beginning. Van Dijk: "Having painted a landscape with lots of grass in it, there obviously had to be something to eat all that grass. That was the start of the second painting. Well, once you have a animal eating plants, you are bound to need something to eat that animal in turn. That is how Furaha grew, and continued to grow."

A series of paintings followed. Later on Van Dijk started elaborating Furaha in other ways than using a painter's canvas. He writes essays on the biological background of his creations and simulates their anatomy using a computer. An astrophysics friend helped him to find a suitable spot in our galaxy for Furaha: in orbit around the star Nu Phoenicis IV. This star is of the same type as our sun and could therefore in principle support life.

Now, over thirty years after that first painting, the oceans and continents of Furaha are filled with life, there are detailed maps of the planet as well as descriptions of its climate. While there is a serious scientific background to the work, shaping the world flows from Van Dijk's fantasy.

This unusual hobby is known as 'speculative biology'. There aren't many speculative biologists. Van Dijk is familiar with most of the worlds they created. "There is the planet Nereus by Evan Black, there's Snaiad by Mehmet Kösemen and Epona, a collective project. There are a few projects dealing with the evolution of life on Earth in case the dinosaurs would not have gone extinct. That's largely it."

"There are certainly more people who wish to start a similar project", Van Dijk says, "but most do not combine a scientific background with artistic talent. Moreover, most projects stop after a few years' such as Snaiad, for the simple reason that they take up so much time. In fact, I stopped working on Furaha for years on end, but kept getting back to it. Fuaraha allows me to paint, write design and program. It meets to many of my needs to let it go."

Click to enlarge; copyright NRC / Gert van Dijk

How the woolly-haired shuffler came into being he no longer remembers in detail. "It's possible I had recently been looking at pictures of a rhinoceros. Things may just click together in my head. The inside of the skin folds of rhinos could well be covered in hairs, I may have thought."

That was the basic concept around which the animal took shape. "A skin fold covered in fur would be able to trap more warm air than one without hair. A fur coat, turned inside out, would have the same effect. That is in fact how the Inuit put their fur coats together", he explains. An animal with such furry folds would be able to deal with below-zero temperatures. And its shovel for a snout? "That evolved by itself".

In the end, Van Dijk painted the woolly-haired shuffler while it was upturning snow or soil in a search for plant roots or anything edible (see the cover). Its biology and ecology have been described in detail on Van Dijk's weblog. For instance, that says that the animal lives in small herds, and that that are small parasites living in the fur of its skin folds (trichophages).

Van Dijk does not use any fixed recipe to come up with a new life form. Sometime an animal crystallises around an interesting biological principle. The 'radial flyers', small creatures with four wings, came into being while he was sketching. Their wings are placed at an angle of 90 degrees to their body, like the blades of an helicopter rotor. The first sketches of these 'tetropters' showed a bilaterally symmetrical body , like a bird's, hanging under the wings. "That did not feel altogether right. I then thought it better to make the entire animal radially symmetrical, such as starfish or jellyfish."

In flight, the animals look a bit like helicopters as well. "Thanks to their design they have excellent manoeuvrability, but they aren't that fast in horizontal flight", Van Dijk explains. "The wings move in a figure eight-like pattern. A wing briefly beats against another one twice in every movement cycle. This creates additional lift". He explains calmly how this works. "Pigeons taking off do the same thing. Their two wings beat against one another above their backs. The contact between the wings does not only cause the characteristic sounds of pigeons taking off, but also causes extra air to be sucked in, and that generates an upwards force."

Van Dijk visualised the flight of these four-winged little creatures with computer simulations. The resulting flight of these radial flyers look looks organic. Their wings swing gracefully to and fro, rather like flags in the hands of a flagthrower. This mode of flight actually makes sense, as was proven by engineers a few years ago. With some pride Van Dijk wrote on his blog that they built a flying robot with four wings, flying in exactly the same manner as Furahan tetropters.

Another source of inspiration is nature on Earth. This is most apparent in those creation he labels as 'supercharged Earth designs'. One example of supercharging was his take on the undulating membranes of squids. "I started sketching animals with not two, but four of such membranes: two at the top and bottom, and two at the sides. From that design an animal emerged with a screw-like propulsion system."

There is no place on Furaha for unrealistic creatures. Ballonts, creatures that float by virtue of being lighter than air, may be struck from the record soon. Van Dijk: "I am beginning to think that balloon-like organism are not going to work. To keep them in I already increased the density of the atmosphere, but I do not really think that that is enough. That is a pity, because that would mean I have to abolish them."

No matter how exotic the Furahan fauna may be, most animals still look plausible and familiar. Why is that? Van Dijk: "That is an interesting question. Is the resemblance with life on Earth the result of a workable biomechanical design, or because many design models are simply prewired in my imagination?" He does not have the answer. One thing is certain, and that the resemblance is not introduced on purpose to make Furaha more palatable to his audience. Van Dijk: "I do not make any concessions to what people might like".

Making too many concessions is something he blames James Ccameron for, the director of the science fiction movie Avatar. Avarar takes place on the moon Pandora where there are six-legged animals, just like on Furaha. Wolves, horses and monkeys all have six-legged analogues on Pandora.

Van Dijk criticises their 'awkward' anatomy. "The horse analogues in Avatar have one pair of hind legs and two pairs of front legs, placed very close together. If you look carefully you will see that the two pairs of front legs move in synchrony. The designers simply doubled the front legs, so the animal looks in exactly the same way as a four-legged animal. At first glance they look cool, but essentially they are just horses with added frills."

The fact that Avatar is a science fiction movie is no excuse, Van Dijk thinks. "Of course, enjoying science fiction requires a degree of suspension of disbelief. But no-one ever claimed plausibility for the aliens of Star Wars or the sand worms of Dune, in contrast to what happened with Avatar. Cameron and scientists he hired claimed to have developed an accurate and biologically plausible world, and they simply did not.", Van Dijk says.

Obviously, Furaha reaches a fraction of the people of a Hollywood blockbuster. Van Dijk supposes that Furaha mainly attracts people with a higher education, interested, like he is, in what happens in the intersection of science and the arts. Still, he would definitely like to widen the readership of Furaha, for instance by publishing a book. In fact, he already posted a fake encyclopaedia of life on Furaha, including illustrations and infographics. He doesn't think there is a good chance of it getting published: "I do not know much about publishing books, but I guess that the market for such a work is very small."

You would expect professional biologists to be interested in a hobby that is so closely allied to their area of interest. Astrobiologists, dealing with the science of life on other planets, in particular might show an interest. But, apart from a rare exception, cross pollination between biologists and those working in speculative biology seems not to happen. Van Dijk: "They ought to like it in their heart of hearts. But perhaps astrobiologists do not wish to be associated with speculative biology. They are dealing with serious science and may prefer not to be to be portrayed as believers in little green men. Neither do I, by the way. I regard what I am doing as an intellectual and artistic game."

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Legends
- (Left bottom pen drawing) Furahan fish developed variable numbers of jaws and fins
- (Underneath the block of six paintings) Top row, from left to right: many-legged grouillards, honeysucker, mowers. Bottom row, from left to right: landscape, phleph and worryw. All images: copyright Gert van Dijk
- (Right top) Tetropters generate extra lift by clapping their wings together in the same way insects and pigeons do.
- (Far right) Tetropters are very manoeuvrable and can let themselves drop very quickly. They cannot fly fast.

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Click to enlarge; copyright Gert van Dijk

It is quite possible that some of the images are new to the readers. The one above, a phleph, has featured on the front page of the site at one time. Its formal name is Vanitas sursumvergenspropterpenuriaponderis, and yes, that does mean something...

Furaha in the Science Section of NRC Handelsblad

Well, when I came back from travelling abroad I found that 'NRC Handelsblad' had indeed devoted ample room to the Furaha project. 'NRC', as it is known, is a Dutch quality national newspaper. The weekend edition has a 12 page science supplement, and this weekend's supplement had three pages on Furaha: the cover and the spread in the middle.

I am afraid I cannot direct you to the relevant pages on the internet to have a look for yourselves, as these are open only to paying customers. Those with subscriptions can download a good quality pdf file. I have a subscription and have the download, but will not publish it here. After all, the newspaper is supposed to make money. Then again, at some point in the future I may yet do so after conferring with the newspaper people. For similar reasons the images below will give you an idea what the article looks like but not in enough detail to read it. Most of you would be unable to read it anyway, it being in Dutch, my native language. It is a very nice article, written by Lucas Brouwers, who also writes a blog -in English- on evolutionary biology.

Here is the cover. I took it from the digital edition, meaning the contrast is much better than in the printed edition, and the colours are also closer to those of the original. 'Wetenschap' means 'science'. (The two words may not overlap entirely. The English version of Wikipedia has a nice entry of the meaning of the word science: "Over the course of the 19th century, the word "science" became increasingly associated with the disciplined study of the natural world including physics, chemistry, geology and biology. This sometimes left the study of human thought and society in a linguistic limbo". In Dutch 'wetenschap' seems to used in the latter broad sense more often than in the narrow one).

Click to enlarge; copyright NRC / Gert van Dijk

Anyway, this is the 'woolly-haired shuffler', that can also be found on the Furaha site; it also featured in the Furaha blog when I first posted it on the main site. The name is a correct translation from the Dutch 'wolharige schoffelaar'. In both languages the adjective 'woolly-haired' was of course taken from the name of the 'woolly-haired mammoth', a name I have always considered as odd as it is funny. I do not think there are other animals, extant or extinct, whose name expresses a quality of their pelt. I have never heard of the 'silken-haired panther' or the 'greasy-pelted otter'; perhaps in poor prose, but not in an animal's name. The text of the paper uses 'wolharige schoffelaar' as intended, but the headline, after translation, reads 'Hairy shufflers and radial flyers'. Newspaper headlines are often written by other people than those who write the body of a text, for reasons unknown to me. Perhaps there was not enough room for the full name, but now the name states that the animal is particularly hairy and it is not...

Click to enlarge; copyright NRC / Gert van Dijk

And this is the inner spread. Regular readers will recognise most images. Two have not been published on the site though, eroding my store of fresh images a bit more. Mind you, the text does not go into what they are or why they look the way they do, so some mystery remains.

You might wonder why a science section of a serious newspaper devoted three pages to a speculative biology project, and that was what I asked the journalist before the interview. He answered that neither he nor his colleagues had any trouble with a mixture of solid science with creative and less factual matters. I am glad of that. Science is too often treated by scientists and others as if it is so serious that you should speak only about it with a straight face and in hushed tones. Well, without creativity science would not only simply not work but would be nothing more than drudgery. I hold similar views about the speculative side of matters, where I prefer to see a mixture as well: fantasy is not the same as idiocy. The best of science fiction is characterised by a 'sense of wonder' as well as a 'what if?' attitude. You cannot do science without them.