Wombats Poop in Cubes and Science Has Thoughts About It
Meet the wombat: a chunky, burrowing marsupial native to Australia that looks like a potato with legs and has quietly solved a geometry problem that stumped engineers for years. Its superpower? Producing cube-shaped poop. Not sort-of-boxy. Actual cubes. About 80 to 100 of them per night.
The mystery wasn't just what — it was how. Most cube-shaped objects in nature require a mold or a cutting tool. The wombat has neither. For a long time, scientists assumed it had a square-shaped digestive tract, which turns out to be close but not quite right.
In 2021, researchers finally cracked it. Wombat intestines have varying elasticity — some sections are stretchier than others — and as waste moves through, this uneven squeezing gradually shapes it into cubes. It's like nature invented a stress-ball that also makes dice. The discovery earned the team an Ig Nobel Prize, which honors research that first makes you laugh, then makes you think.
As for why cubes? Wombats use their droppings to mark territory. Cube-shaped ones don't roll away, making them excellent little signposts. Evolution, it turns out, has a very practical sense of humor.
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