December 28, 2025
Udderly in a vacuum
Spherical Cow
Internet moos as coders pack “cows” for space, skeptics call bull
TLDR: An open-source tool packs small spheres into a big one—yes, you can build a “spherical cow.” Commenters split between jokes about cows in space and reminders that simplified models aren’t reality, making it a meme-worthy but genuinely useful tool for simulations like skull impacts and space habitat planning.
A new open-source tool called “Spherical Cow” promises one thing and one thing only: packing a bunch of little balls inside a big ball. And the internet is obsessed. Named after the classic academic joke—solutions that only work for “spherical cows in a vacuum”—this Rust library lets you literally build a spherical cow and pack spheres for real-world simulations of skull fractures, tool stress, and even inflatable space habitats. Documentation? It’s all on docs.rs. Examples? Yes, the cow is included.
The strongest reactions: jokesters and space nerds are cheering, while modeling purists are rolling their eyes. pinkmuffinere deadpanned that the library “even delivers on the ‘in a vacuum’ bit,” leaning hard into the Moon/Mars angle. dwattttt praised the understatement: “Did not over-promise.” Meanwhile, bruce511 threw shade at the meme, arguing that calling it “only” for spherical cows misunderstands modeling—translation: it’s a simplified tool, not the final word on reality.
Culture references flew in, with borborigmus invoking Chris Morris’ “Brass Eye” era, as if the devs snuck a cow-shaped easter egg into computational geometry. The drama? A tug-of-war between “lol cows in space” and “serious modeling matters.” Bottom line: it’s clever, useful, and meme-friendly—an academic joke that somehow hoofed its way into practical simulations, and the comments are loving the pasture brawl.
Key Points
- •“spherical_cow” is a Rust library for high volume fraction sphere packing based on an advancing fronts algorithm from Valera et al. (2015).
- •Documentation is available on docs.rs, with a simple example packing spheres of radii 0.1–0.2 into a container sphere of radius 2.
- •The referenced algorithm’s paper includes use cases: packing skull models for fracture studies and packing cutting tools to locate failure points.
- •The library was initially developed to optimize layouts of inflatable space habitats for potential use on the Moon and Mars.
- •The project is dual-licensed under Apache-2.0 and MIT; example-only dependencies include wayland-protocols via kiss3d and obj, with specific LGPL-licensed content attributed to Martin Gräßlin.