How Wombats Produce Cube-Shaped Poop

write-up · for knighthk in #systemcrafters · 2026-07-02 11:01 UTC

Wombats produce cube-shaped feces due to specialized elasticity variations in their intestines that shape waste during the final stages of digestion.

Researchers identified two grooves in the wombat intestine where tissue is more elastic, creating regions of varied thickness and stiffness.
Mathematical models show that stiffer intestinal sections contract faster than softer ones, molding the flat sides and sharp corners of the feces over several days.
Unlike other mammals with consistent peristalsis, wombats use irregular contractions to squeeze out nearly 100 six-sided turds daily.
The cubic shape likely evolved as a territorial marking adaptation, preventing droppings from rolling off rocks and logs.
This biological mechanism may help engineers shape sensitive materials and assist captive wombat caretakers in monitoring health based on fecal squareness.

Commenters express genuine amusement and appreciation for the article’s playful tone, with many praising its humor, puns, and engaging writing style compared to typical scientific reporting. The discussion frequently tangents into other interesting animal facts, such as Swiss marmots’ seed-spitting habits, and draws comparisons to related studies on square holes or wombats. A notable disagreement emerges regarding vocabulary, where one user insists on using "shit" or "turd" instead of the softer term "poop," while others find the latter charming. Overall, the mood is lighthearted and entertained by the quirky science of wombat excrement.

Source: https://www.science.org/content/article/how-do-wombats-poop-cubes-scientists-get-bottom-mystery

See also