An outlet for actually random ideas: experiments, rabbit holes, and things that seemed like a good idea at 2am.
I turned DaVinci Resolve project files into a cutscene engine
I was building the intro for a match-3 game called MatchCraft, made in Godot. Thirty-six seconds: eight painted slides that slowly push in and cross-dissolve into each other, a narrator over the top, ambient sound underneath, subtitles fading in and out on the beat of the voice. The obvious way to ship that is to render a video and play it. I did not want a video. So I ended up using DaVinci Resolve, a professional video editor, as the authoring tool for a cutscene that never becomes a video at all. The game reads the edit out of Resolve’s project file and replays it live. ...
How does 20 questions work? Twenty is not an arbitrary number
Twenty questions. Yes or no answers only. Somebody thinks of a thing, and you have to find it. The number twenty looks like a folk choice, the sort of round figure a Victorian parlour settles on. It is not. Twenty is very close to exactly the right number, and you can derive it. Every question is worth one bit, at best A yes-or-no answer can carry at most one bit of information. One bit halves the space of possibilities. Ask a perfect question and whatever the answer, you throw away half the world. ...
What do foxes eat? About fifteen rodents a day
Search this and you get a list. Rodents, rabbits, birds, insects, earthworms, berries, carrion, and whatever fell out of your bin. Every source has the same list because the list is correct. It is also useless, in the way that a list of things a car can run into is useless if what you wanted to know was how fast it goes. I wanted the number. How much food does a fox actually need, in a day, and what does that imply about how it spends its time? The answer turns out to explain the list. ...
What would aliens look like?
I asked whether intelligent life on another planet would follow anything like our evolutionary path, or whether humans are a one-off. Everybody who answers this question reaches for the same argument, and I reached for it too before I checked it. It is a good argument. It is also, in the specific form everyone uses, wrong. The argument everybody makes Evolution repeats itself. Give it the same problem twice and it finds the same answer twice, so the features that keep reappearing on Earth are the features we should expect anywhere. ...
Can an AI guess what it knows?
Last New Year’s Eve I asked ChatGPT a question that has been rattling around my head: based purely on your training data, if you had to guess (without looking anything up), is “Wentworth Valley Campground” notable enough to have a wikipedia page? That is not really a question about a campground. It is a question about whether a model can look inward and estimate the density of its own knowledge. Every hallucinated citation I have ever been handed is a failure of exactly this skill. ...
Is the sun getting hotter?
I went into this expecting the Sun to have been more or less constant for the whole history of life, wobbling a bit with sunspot cycles. That is wrong, and it is wrong by a lot. It is also a question that answers itself slightly sideways. The Sun is getting brighter, dramatically so. It is barely getting hotter. Those are different things, and the gap between them is the interesting part. ...
How thick does a monitor stand need to be?
I wanted a monitor stand to lift a Samsung Odyssey Neo G9 off my desk. The monitor is 49 inches of curved glass and weighs about 14.5 kilograms with its stand attached. My stand would be 1000 mm wide, 380 mm deep, 170 mm tall, cut from a single pine panel. One question mattered more than any of the joinery: would a metre of pine bow in the middle under all that? ...
Do your cells replace themselves every 7 years?
You have heard this one. Every seven years, every cell in your body has been replaced, so you are a physically new person, and the coffee stain you feel guilty about was technically spilled by somebody else. It is a lovely thought and it is not true. Some of the cells reading this sentence have been with you since before you were born. We know that with unusual confidence, and the reason is grim and wonderful. Between 1955 and 1963 the world tested nuclear weapons in the atmosphere, and in doing so accidentally wrote a date stamp into every living thing on the planet. ...
Why can't humans photosynthesize?
Last October I asked whether you could engineer a human, or any mammal, to run on sunlight the way a plant does. I expected a biology answer, something about genes and organelles and immune rejection. What I got was arithmetic, and the arithmetic ends the argument before biology gets a turn. The answer everyone gives is the weakest one Search this question and the first thing you will read is that humans cannot photosynthesize because we have no chloroplasts and produce no chlorophyll. ...
Does the Earth's rotation affect flight time?
Flying from Auckland to Santiago takes about eleven hours. Coming home takes closer to thirteen. The explanation everyone reaches for is that the Earth spins eastward, so on the way east the destination comes to meet you, and on the way back you have to chase it. This is wrong, and it is wrong in a way I find genuinely satisfying, because the thing people are blaming turns out to be responsible after all. Just not for the reason they think. ...