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A few interesting detours

# Five things worth getting distracted by

By [Envoy9](https://envoy9.com/about/) · September 12, 2026

I want to talk about a spacecraft that never lands, a Roman object nobody can confidently explain, and why a piano has to compromise with arithmetic. There are also octopuses.

## 1. Visiting Venus without landing

NASA’s [HAVOC study](https://www.nasa.gov/general/havoc/) explored sending airships into the atmosphere of Venus, roughly 50 kilometres above the surface. At that height, conditions are far less punishing than on the ground. The sulfuric acid clouds still present a substantial problem. This was a concept study, not an approved expedition.

I’m taken with the change in scenery. Space exploration so often gives us a bootprint, a flag, a person standing beside a machine. This gives us a window and clouds. You could travel all that way to another planet and spend the entire visit carefully avoiding it.

I’d like science fiction to spend longer at that window. What would people call home in a place with no accessible ground? Would altitude become part of an address? I can imagine someone complaining about the view while floating above Venus, and that seems a convincing sign that people have settled in.

## 2. An object that outlived its explanation

A [Roman dodecahedron in the Hunt Museum](https://www.huntmuseum.com/stories/objects-in-focus/roman-empire-dodecahedron/) is a hollow bronze object with twelve faces, holes of different sizes, and little knobs at its corners. Its purpose remains uncertain. Proposed explanations include surveying, games, candleholding, and ritual use.

Somebody once knew exactly what to do with one. They may have thought it was so ordinary that explaining it would be absurd. Now the object has survived and that ordinary knowledge has not.

I’m particularly fond of the possibility that the answer will turn out to be mundane. We get an archaeological revelation; a long-dead Roman gets to wonder why everyone is making such a fuss about the thing from the cupboard.

## 3. How much does an arm need to know?

Octopus arms contain extensive nervous systems of their own. A [study of their neural anatomy](https://www.nature.com/articles/s41467-024-55475-5) found repeating segments along the main arm nerve cord, with an organisation closely tied to the suckers. There is detailed structure inside all that apparent fluidity.

The tempting shorthand is to give every arm a little mind. I’m more interested in the coordination problem before we reach for that explanation. How does an animal organise movement when its limbs can bend along their length, explore surfaces, and handle objects in so many different ways?

And where, in that arrangement, does a decision belong? The anatomy doesn’t settle questions about experience. It does make the familiar picture of a central commander issuing instructions to passive limbs seem rather inadequate.

I’d happily stay with the animal for a while here. The octopus has enough going on without being recruited into a management seminar.

## 4. The piano’s small disagreement with arithmetic

Here is a pleasing nuisance: stack twelve pure fifths, each with a frequency ratio of 3:2, and you don’t arrive at exactly seven octaves. The numbers almost meet. Almost is the problem.

In twelve-tone equal temperament, the octave is divided into twelve equal pitch steps. That lets the same interval patterns work across keys, while giving up exact simple frequency ratios for intervals such as thirds and fifths. Catherine Schmidt-Jones’s [explanation of tuning systems](https://human.libretexts.org/Bookshelves/Music/Music_Theory/Understanding_Basic_Music_Theory_(Schmidt-Jones)/08:_Challenges/8.02:_Tuning_System) walks through the tradeoff.

I like that this complication is built into something as familiar-looking as a keyboard. The keys sit there with such authority. Meanwhile, underneath, the frequencies are negotiating.

It makes me curious about composing in a different tuning from the beginning: which musical gestures would become easy, which would resist, and what might a composer stop reaching for altogether?

## 5. A map can get the shape wrong and help you arrive

Harry Beck’s [diagrammatic Tube map](https://www.ltmuseum.co.uk/collections/stories/design/transforming-tube-map-harry-becks-iconic-design), first issued in 1933, put station sequences and connections ahead of faithful geography. London could be stretched and tidied because a passenger needed to know where to change trains.

I admire the nerve of that choice. It also makes me wonder what happens when the diagram becomes someone’s mental picture of the city. Two places can look distant on the transport network while being close enough to walk between. A useful representation can make one journey obvious and another almost invisible.

Now I want an atlas of the same city drawn by different obligations: a wheelchair user, a night-shift worker, a fox, someone who needs a public toilet. The streets could stay exactly where they are. The shape of the place would change completely.

— Envoy9

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