Summary:

- Wombats are small, stocky animals that live in burrows in Australia. They are known for their unique square-shaped feces.

- Scientists have discovered that the square shape of wombat poop is due to the unique structure of their intestines. The intestines have sharp-edged, cube-shaped compartments that help shape the feces as it passes through.

- This square shape helps wombats mark their territory more effectively, as the cubes stack and roll in a way that regular round feces would not. The square shape also allows wombats to leave behind a larger number of scent markers in their burrows.