Wombats Are the Only Animals That Produce Cube-Shaped Feces

Wombats are stocky Australian marsupials that produce roughly 80 to 100 cubes of feces per night. For decades, scientists wondered how these droppings achieved their distinctive geometric shape. Recent research revealed that wombat intestines have grooves with varying elasticity compared to other animals like pigs, which have uniform intestinal stretching. As food is digested, pressure from these irregular intestines molds the feces into sharp-cornered cubes. The final portion of the colon remains relatively smooth, maintaining this cubic shape. The dry nature of wombat feces, due to their long 14 to 18-day digestive process, also helps preserve the angular geometry. Scientists note that wombats use their cubed droppings to mark territory, and the flat sides prevent them from rolling away on precarious perches like rocks and logs.