Wombats' Square Deal: The Only Animal That Poops Perfect Cubes!

This peculiar cuboid shape is attributed to the varying stiffness and elasticity within the final section of their intestines, particularly the last few meters. Unlike typical circular contractions, the wombat's gut applies uneven pressure, molding the waste into distinct cubes during the digestive process, which can take up to 18 days. This adaptation is vital for their communication, as wombats stack their droppings on prominent rocks and logs to signal to other wombats, and the flat sides of the cubes prevent them from tumbling off these elevated markers.