The odd mechanics of living things, by Maren.
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Sand is one of the most familiar materials on Earth and one of the most poorly understood by physics. It flows like a fluid, supports weight like a solid, exhibits force chains that physicists are still arguing about, and refuses to fit into the continuum equations that describe ...
Cellular automata are the simplest possible computational systems and they exhibit some of the deepest behavior we know how to study. The schoolroom version is Conway's Game of Life. The mathematical reality is that the simplest known universal computer fits in three lines of pseudocode.
Glaciers are solid ice that flows downhill at speeds measured in meters per year, and the explanation involves crystal physics, pressure-melting, and the strange in-between behavior of materials near their melting point. A field guide to ice that creeps.
Spirals appear at every scale in nature — galactic arms, hurricanes, ammonites, sunflowers, snail shells, the double helix. The reason is not coincidence; it is that a small number of mathematical processes generate spirals as their natural shape, and these processes recur at every scale where
A soap bubble is a small machine for solving a difficult mathematical problem: find the surface of minimum area enclosing a given volume. The fact that bubbles solve this problem instantly, by physics, has occupied mathematicians for two centuries — from Plateau's experiments with iron-wire frame...
The most common word in any language is roughly twice as frequent as the second most common, three times as frequent as the third, and so on. The pattern holds across languages and centuries. Why it does is one of the deepest unsolved questions in linguistics.
The 1990s discovery that origami is computationally hard — that determining whether a crease pattern can fold flat is NP-complete — turned a children's craft into a substrate for serious mathematics. The applications now include space telescopes, heart stents, and self-folding robots.
A termite mound in the African savanna can hold its internal temperature within a single degree of optimal while the outside swings 30 degrees daily. There is no power source, no fan, no thermostat. The mound itself is the climate control system, and humans have spent the last twenty years tryi
Below 200 meters, sunlight ends. The dominant source of light in the largest habitat on Earth — the deep ocean — is light produced by living things. Bioluminescence is not a curiosity. It is the visual baseline of most of the biosphere.
A knot in mathematics is what you get when you take a tangled loop of string and ask whether it can be untangled without cutting. The question turns out to be hard, and the answers connect sailors, organic chemists, and quantum physicists across two centuries.
Spider silk is stronger than steel by weight, tougher than Kevlar, and more elastic than rubber. The web architecture that uses it is the result of five hundred million years of optimization. Both are still beating modern engineering on multiple axes.
An ant colony solves problems that would defeat any individual ant. The mechanism is not central command but a small set of local rules executed in parallel by tens of thousands of agents, and the algorithms that emerge are the same ones we now use to solve problems in computer networks, traffi