Category: Geek stuff

If it involves physics, math, computer science, electronics or has general geek cachet, this is the place for it.

Mars as a refuge for humanity?

Consider the 2015 Newsweek article: “Star Wars’ Class Wars: Is Mars the Escape Hatch for the 1 Percent?” which claims “the red planet will likely only be for the rich, leaving the poor to suffer as earth’s environment collapses and conflict breaks out.” The only way you could believe this would be if you had no idea how thoroughly, incredibly, impossibly horrible Mars is. The average surface temperature is about -60°C. There’s no breathable air, but there are planetwide dust storms and a layer of toxic dust on the ground. Leaving a 2°C warmer Earth for Mars would be like leaving a messy room so you can live in a toxic waste dump.

The truth is that settling other worlds, in the sense of creating self-sustaining societies somewhere away from Earth, is not only quite unlikely anytime soon, it won’t deliver on the benefits touted by advocates. No vast riches, no new independent nations, no second home for humanity, not even a safety bunker for ultra elites.

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Mars is nowhere near being a Plan B home for humanity anytime soon. Consider a worst-case climate scenario. The oceans have swollen ten meters higher, drowning New York City and Boston. Low-lying countries like Belgium and the Netherlands have been swallowed up whole. Heat waves make parts of the Southern Hemisphere uninhabitable as the planet is ravaged by floods, droughts, wildfires, and massive tropical cyclones. More than half of the world’s species die, coral reefs become bleached skeletons, freshwater sources from snowpack melt away or are fouled by rising seas, tropical diseases make their way into formerly temperate climates. Crops fail, people starve, and violence breaks out as over a billion climate refugees beat against the closed gates of the comparatively livable North.

That planet? Eden compared to Mars or the Moon. That Earth still has a breathable atmosphere, a magnetosphere to protect against radiation, and quite possibly still has McDonald’s breakfast. It’s not a world we would like to inhabit, but it is the one world in the solar system where you can run around naked for ten minutes and still be alive at the end.

Weinersmith, Kelly and Zach. A City on Mars: Can we Settle Space, Should we Settle Space, and have we Really Thought this Through? Penguin Random House, 2023. p. 2, 137-8

Related:

Notebook LM on this blog for 2023 and 2024

I have been experimenting with Google’s NotebookLM tool, and I must say it has some uncanny capabilities. The one I have seen most discussed in the nerd press is the ability to create an automatic podcast with synthetic hosts and any material which you provide.

I tried giving it my last two years of blog content, and having it generate an audio overview with no additional prompts. The results are pretty thought-provoking.

AI image generation and the credibility of photos

When AI-assisted photo manipulation is easy to do and hard to detect, the credibility of photos as evidence is diminished:

No one on Earth today has ever lived in a world where photographs were not the linchpin of social consensus — for as long as any of us has been here, photographs proved something happened. Consider all the ways in which the assumed veracity of a photograph has, previously, validated the truth of your experiences. The preexisting ding in the fender of your rental car. The leak in your ceiling. The arrival of a package. An actual, non-AI-generated cockroach in your takeout. When wildfires encroach upon your residential neighborhood, how do you communicate to friends and acquaintances the thickness of the smoke outside?

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For the most part, the average image created by these AI tools will, in and of itself, be pretty harmless — an extra tree in a backdrop, an alligator in a pizzeria, a silly costume interposed over a cat. In aggregate, the deluge upends how we treat the concept of the photo entirely, and that in itself has tremendous repercussions. Consider, for instance, that the last decade has seen extraordinary social upheaval in the United States sparked by grainy videos of police brutality. Where the authorities obscured or concealed reality, these videos told the truth.

Perhaps we will see a backlash against the trend where every camera is also a computer that tweaks the image to ‘improve’ it. For example, there could be cameras that generate a hash from the unedited image and retains it, allowing any subsequent manipulation to be identified.

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Cleese for the record

But in other areas I was becoming less diffident—or, in St. Peter’s parlance, less “wet.” Indeed, on one occassion, I actually got into a fight with a boy who was teasing me. There I was, lying on the floor, grappling with him, like a proper schoolboy; I even banged his head on the floor, at which point I thought, “Oh my God! If I start losing, he’ll do this to me,” and then, of course, started losing. Fortunately my form master, Mr. Howdle, arrived and broke the fight up. Funnily enough, it was about then that the bullying stopped. This first fight also proved to be my last. I had thought so, anyway, until I read in the Sunday Times recently that I had a fight with Terry Gilliam in the ’80s. I think this is unlikely: owing to the relatively rare occurrence of fisticuffs in the Cleese life it must be statistically probable that I would remember such uncommon events; they would tend to stand out sharply from the rather less pugilistic tone of the rest of my life. And I definitely don’t recall having a fight with Terry Gilliam. May I also point out that if I had, I would almost certainly have killed him. I think the only possible explanation for the Sunday Times article—if it was true—was that Terry attacked me, but that I failed to notice he was doing so. Terry is very short, due to his bandy legs, so when he scuttles around, he stays so close to the floor that it can be difficult to see what he is up to down there.

Cleese, John. So, Anyway… Penguin Random House, 2014. p. 43 (italics in original)

Enjoying Toronto’s Bike Share in the summer

On Wednesday evening, I did a 55km bike ride: east from the U of T campus across the Don into the beaches area, down to the southern tip of Tommy Thomson Park, then along the waterfront for a picnic dinner at a Queen’s Quay grocery store, and up the hill to The Perch.

These animations show the ride in yellow as well as all my previous walks and rides since 2020 in green: