Thank GOD we have an administration that believes in science again!
Today, we learned something new from Science Magazine: They’ve solved the mystery of wombat poop.
The bare-nosed wombat of Australia famously squeezes out nearly 100 six-sided, cube-like turds every day (see above). And for hundreds of years it has mystified scientists. I mean: HOW do square turds come out of a ROUND anus?
Now, researchers say they have uncovered how the wombat intestine creates this “exceptional excrement.”
To get to the bottom of the mystery, scientists dissected a wombat that had died after being hit by a car. They examined the intestines and found that they contain two grooves where the guts are more elastic, which the team first reported in 2018.
In the new study, the researchers dissected two further wombats and tested the guts’ layers of muscle and tissue, finding regions of varied thickness and stiffness. They then created a 2D mathematical model to simulate how the regions expand and contract with the rhythms of digestion. The intestinal sections contract over several days, squeezing the poop as the gut pulls nutrients and water out of the feces, the team reports today in the aptly titled journal Soft Matter.
The stiffer portions are “like a stiff rubber band—[they’re] going to contract faster than the soft regions,” says David Hu, a biomechanics researcher at the Georgia Institute of Technology and author on the study. Softer intestinal regions squeeze slowly and mold the final corners of the cube, the team found. In other mammals, the wavelike peristalsis of the intestinal muscles are consistent in all directions. But in the wombat, the grooved tissue and the irregular contractions over many cycles shape firm, flat-sided cubes.
So now you know. As to WHY they evolved to pooping charcoal briquettes, it’s because they leave them as calling cards to mark their territory, and square poo doesn’t roll off rocks like your typical log-shaped poo. Which…. totally makes sense.
Also interesting: The squarer the poop, the healthier the wombat.
A big questions remains: Will this information somehow find its way onto a RuPaul’s Drag Race Down Under episode?