Cycles of Change

Engineering practical systems and exploring the physical world.

A rock climber on a granite wall in Yosemite Valley falls when her fingers slip off a hold 40 meters above the ground. The rope catches her. She hangs in the harness, spinning slowly, staring at the section of wall she just failed to climb. The choice at that moment is straightforward. She can [...]
Every year, the global industrial economy rips roughly 100 billion tons of physical material out of the earth. Imagine a line of standard dump trucks bumper to bumper, each one carrying its full load of rock and dirt. That line would stretch from the earth to the sun and back, twice, every single [...]
A touring cyclist carries everything on two wheels. Shelter, tools, food, and clothing all ride on one frame, exposed to the open air whenever the rider stops moving. Shopping inside a traditional retail store forces the rider to walk away from that bicycle and leave it locked to a post on a public [...]
A physical prison requires armed guards, thick concrete walls, and a massive budget to keep people locked inside. Throughout history, governments spent immense amounts of money and physical force trying to control what their citizens believed. The East German Stasi employed an estimated 274,000 [...]
The atmosphere wrapping this planet has no customs office. A molecule of carbon dioxide released from a coal plant in one country drifts across an ocean, traps heat above a different continent, and melts ice that raises sea levels around a third. A virus evolving in the lungs of one person boards [...]
If the public provides the raw material that powers artificial intelligence, the next step requires building a container to capture the value of that material. The previous argument established that machine learning models rely on human knowledge to function. The companies building the software [...]