Graffiti – often seen as a bad thing; vandalism (I for one, am a fan for the most part). Then there is "non-intrusive" graffiti, that has a temporary, transient and digital component. Light painting. An act in space and time, that afterwards only lives digitally. The documentation of the act is the only evidence. So ...

I was once walking around Crystal Palace Park, waiting for a movie festival to begin, when a man approached me and my friend and asked us if we had seen the dinosaurs. We were confused at first, but he quickly pointed at some massive and frankly strange-looking sculptures that were spread around the park. Only ...

In 2012, the New York times published an article called "Africa's fabric is Dutch". And although there is currently an intense relationship between African consumers and traders, the story of African textiles goes well beyond Vlisco's double-sided, wax-printed cotton fabric. This fantastic short article made me realize that the image of the "naked African" is one too common, ...

In July 1944, a German merchant named Waldemar Julsrud announced he had discovered several thousands ceramic figurines in Mexico, representing everything from supposed dinosaurs to peoples from all over the world. Julsrud had an impressive collection: Over 32,000 original pieces. You can see a few of them here: When I read about this story, I was instantly ...

This article title is absolutely on point. About a year ago, I started a post but just filled in the headline. Naturally, I completely forgot about it until Bente asked me about the draft. What I didn't tell her was that by then I had no idea what the original intention had been, but I was pretty sure it wasn't ...

The network II: drawing meets laser: I made a drawing I told you about n another article, the network (it does not mean anything). The department head in my research group at uni expressed an interest in doing something lage scale on a rather empty wall. A fellow student took the idea and ran with ...

What is architecture? What is design? What is art? Conscious choices. Some kind of cognitive processes that says "naaah. that doesn't work" or "fabfunfantastic!" That is what bowerbirds do. I came across them for the first time as a child. A newspaper we subscribed to used to run a small "interesting-facts from the natural-world" section in a hidden ...

They say in art the greatest compliment is to be copied, and the greatest compliment for poster design is when your poster gets stolen. It seems that print posters are dying. Now we have digital screens that cycle – for the most part – commercials. Should we care? Are posters merely something arty people and ...

If you have ever even remotely been hanging out on with graphic designers, you have come across the logo discussion. Frankly, it is boring, has no answers, and depends on a huge pile of ifs and depends-ons, but the constant fallback is to general guidelines such as clarity, simplicity, it must work on a ballpoint pen and ...

Maria Sibylla Merian (1647 – 1717) was a remarkable woman in many ways. She was a very talented scientific illustrator and had a passion for insects. According to David Attenborough, she contributed immensely to taxonomy in entomology and the understanding of metamorphosis, and she was the first person who travelled on purely scientific grounds. Though ...

Ammonites are amongst the most popular fossil, and they have every right to do so. These beautiful spiral creatures are somewhat related to octupuses and squids, the only difference being that they went extinct 75 million years ago, along with the dinosaurs. When ammonites originated, they were planktonic and tiny. Less than 1mm tiny. As they ...

Here at the visual squirrels, we are not in the habit of promoting stuff, but Calamityware is simply too funny. Taking the classic language of cobalt and porcelain decoration, the artist Don Moyer adds – well – calamity. Volcanoes, robots, tentacles, and all manner of funny creatures hide in the china. The only problem with ...

My friend Elin is turning out to be quite the photographer. To my delight, her work is turning increasingly abstract, and her latest batch is of frozen bubbles. What fascinates me is the sense of spindrift in the crystalline structures. And the ephemeral nature of it; of ice, water, air. Delicately frozen in time, frozen in ...

I made this infographic to show the (current state of things for) human evolution. Or quite current, because there have been some new discoveries, but they are still being debated. Feel free to download, distribute and change it, but please don't crop my name off it as it took me a long time to make it! Licence ...

The guys over at Wisecrack have created one of the most compelling videos collections I've seen. The group - a media collective run by comedians, academics, filmmakers and artists - attempts to answer humanity's most important questions using 8-bit graphics and constant awesome game references.  The videos themselves are great, with some of the most complex philosophical problems ...

Doodling is a great habit to generate new ideas through keeping active. Sketches, drawings and experiments without any objective allow the mind to roam free and prompt new ideas. That's how inspiration is born. Sometimes it's hard to make time for doodling in between all the serious work for customers. That's why I created my ...

Prime numbers are a cryptographer's dream: It's easy to take two very large prime numbers and multiply them, but it's extremely hard to do the opposite. There is no fast algorithm (yet) to factorize an integer into its prime factors, if you try to factor a large prime number you'll have to try every possible number between 2 ...

As humans, we have a very reduced visual spectrum. We can only catch light within certain frequencies, as Newton demonstrated this by dividing light using a prism (a beam of light contains the colors of the rainbow, because colours are wavelengths - the longer wave we can see is red, followed by orange, yellow, green, cyan, blue, and violet, the shortest wave. Whatever falls outside ...

The network. The most common question I get when people see my drawings are "how long did that take you?!"  The next question is "what is it?"  Neither question being relevant or interesting. It seems a piece of work is weighted and valued by time and meaning must be figurative. I find this very odd, this need for everything to ...

When the internet was fairly new, a project without precedent set itself to push the limits of what seemed then inconceivable for both science and technology.  It was called SETI@Home, and it marked the beginning of a completely new era. SETI's goal was to detect intelligent life outside Earth. To do so, the project collected a ...

Puzzles have always fascinated me. Language puzzles, escape rooms, logic problems. When I code, I tend to see the coding problem as a puzzle that I need to solve. Especially CSS feels like that lots of the time. Recently, I dove into my parent's bookcase and fished up this old jewel: This 70s book is ...

This is an old post once posted elsewhere: brought it here when Twitter user @olebjarkoy took a pic of spikes outside a hotel in Norway, tagged it with #hostile. The hotel replied, on Twitter asking him to remove the hostile tag, as it was negative. Does not take a genius to figure how that went ...

A long time ago I made a geologic timeline as a (vector) brush in Illustrator, with .ai and .eps files free for anyone to use. The only thing I ask is that if you use it, let me see the result. Making the timeline was incredibly time-consuming and ludicrously fiddly. So, a while ago I got ...

Been an avid reader of Kurt Vonnegut for a years. Magic, mad, brilliant. I found this visualisation by mayaeilam fascinating (though I would have liked to see the visuals more in the Vonnegutian tratdition of doodlyness, and not quite so sleek-ish). From now on, stories will not be the same... by mayaeilam ...

When I was living in New Zealand, one of my favourite walks was just up the road, to one of Auckland's many natural reserves. You only needed ten or fifteen minutes to get to the top of a small hill. On it, a beautiful Kauri tree solemnly awaited. The sight was impressive, a giant among its normal-sized ...

You have probably heard the expression, and most likely associate it with images of old maps covered in drawings of sea serpents and other mythological creatures. But what are exactly those creatures living on the margins, and how did they get there? Pack your bags and jump on board. But aware, though, for Here be Dragons. Despite its popularity, there ...

Sensory homonculus: of all nonsensical stuff I have made, this sensory homonculus is up there. Stoneware clay, watercolour, acrylic paint. Sensory homonculus Sensory homonculus Sensory homonculus Sensory homonculus Sensory homonculus Sensory homonculus Sensory homonculus Sensory homonculus ...

I write this blog together with Yisela (and Vincent). I have never met either, but Yisela was such a dear that I figured she deserved a gift. So in the tradition of Sofie's book and Adam's book, I made Yisela's book. But you have to be supersupernice to me to get one; well over and ...

The Korowai people, inhabitants of Guinea, have become famous for three reasons. First, there are no records of the group having contact with Westeners until 1974, when anthropologist Peter Van Arsdale and a group of researchers led and expedition to the south bank of the Upper Eilanden River. Second, the Korowai have been reported to practice ritual cannibalism, although there are suspicions this ...

I am not into gadgets. The very word implies something useless; perhaps fun for a week, but quickly discarded. A pet hate of mine is the insane amount of electronics made, for stuff that do not need electronics. Waste of resources, batteries, minerals, human costs and filling up insane landfills with rubbish. Enter the Equil ...

The 99% invisible is a brilliant podcast. I was alerted to the so-called Thomassons. These are architectural artefacts who have lost their function, but, and this is crucial: are still being maintained. For – essentially – no reason whatsoever. It is surprisingly hard to find images that exemplifies it. What I find fascinating, is the ...

It's difficult, if not impossible, to determine what exactly encompasses Islamic art. The term is not specific to a religion, place, time or even a field, and instead spans over 1400 years and receives influences from Roman, early Christian, Byzantine and even Chinese art. Although some think Islamic art is a false concept, the similarities between pieces of the Islamic world ...

Listening to the QI No such thing as a fish podcast, I was alerted to the story of a Japanese girl, while clearing her caretaker-fathers stuff, found this amazing work. Apparently, he spent seven years doing this. I doff my hat. You can buy a print - more on this story here ...

In a lot of medieval manuscripts, there are depictions of knights fighting snails. No one seems to know why this is. There are some theories, but so far nothing really conclusive. It might look like some sort of insider thing, maybe among scribes or illuminators. I love that sort of thing: mysteries in plain sight ...

Out of the generosity of the Order of the Science Scouts of Exemplary Repute and Above Average Physique I have been allowed to recreate their science nerd merit badges. You can find the indexed list here, or you can go directly to my Cafépress profile. No, this will not in any way make me rich and/or famous, ...

There are an estimated 42 species of bird of paradise in New Guinea, and they all look completely different. Females choose mates based on the condition and colour of the males’ plumage, so males puff their feathers, vibrate and buzz to attract their attention. Some even transform their bodies into strange, geometrical abstractions. If successful, these aesthetically ...

A dutch artist – known only as A. Boogert – created a book of colour in 1692. Describing the use of colour in painting, s/he created an 800-page book with instructions on how to create hues and tones. It blows my mind, actually. The work, the meticulousness, the systematics, and not least: a book like that would ...

As mentioned in a previous post, I have dragged out some old tools and materials and started gilding again. In gilders cushion my previous life as a bookbinder, I bought a very old gilder's cushion that actually sits on top of a drawer. I have not seen this anywhere else; it seems a well spent ...

“A joker is a little fool who is different from everyone else. He's not a club, diamond, heart, or spade. He's not an eight or a nine, a king or a jack. He is an outsider. He is placed in the same pack as the other cards, but he doesn't belong there. Therefore, he can ...

This stack-exchange question inspired me to dig out old skills and tools. Untouched for years, I got out my bookbinders gilding cushion and related paraphernalia. Getting back into the fiddlyness of handling gold leaf, I have squandered a few sheets. But it is fun. One thing: you cannot be impatient handling it, breathing is forbidden, ...