Animals fact
Wombats produce cube-shaped poop.
The details
Wombat droppings come out as rough cubes, and a wombat can produce dozens a night. Researchers found the shape forms in the last part of the intestine, where the gut walls stretch unevenly. Wombats stack the cubes on rocks and logs to mark territory, and the flat sides stop them rolling away.
Source: Wombat (Wikipedia)
Think this is wrong? Tell us and we will check it.