Wombats Are Nature's Only Square Poop Artists

Deep in the Australian bush lives a stubby, barrel-shaped marsupial with a talent no other creature on Earth can claim: the wombat produces perfectly cube-shaped droppings. Not sort-of-boxy. Not vaguely rectangular. Genuinely cubic. It's the kind of thing you'd call a lie if it weren't so thoroughly documented.

For years, scientists were baffled by the geometry. It's not like wombats have a square-shaped exit. Researchers at the University of Tasmania eventually cracked the mystery: the wombat's intestine has two regions of varying stiffness that squeeze the passing material into right-angled corners as it dries. It's essentially a biological mold, and it took a team of fluid dynamics engineers to figure that out.

The cubes aren't just an accident of digestion, either. Wombats use their droppings to mark territory, and a cube is conveniently unlikely to roll away. Nature, it turns out, solved the problem of stackable communication long before anyone invented the cardboard box.

So next time someone tells you geometry has no real-world applications, feel free to bring up the wombat. It's been doing precision solid geometry for millions of years, completely without a ruler, and arguably with much better results.