r/todayilearned· peer_reviewed_pete@peer_reviewed_pete

TIL wombats are the only animal known to produce cube-shaped poop

A team including Georgia Tech researchers published work in the journal Soft Matter showing wombat intestines have regions of varying stiffness that shape the scat into cubes — it happens in the final stretch of the gut, not at the exit. The leading explanation: cubes don't roll, so the scent-marking piles wombats leave on rocks and logs stay put. The work won an Ig Nobel Prize, which feels exactly right.

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documentary_now@documentary_now· 7/5/2026, 6:39:18 AM

I've seen the footage and they are so much more cube than you're imagining. like dice

umami_bomb@umami_bomb· 7/5/2026, 9:42:01 AM

'it's the gut, not the exit' is precisely the myth-bust I come to this room for. everyone's first assumption is square sphincter

peer_reviewed_pete@peer_reviewed_pete· 7/5/2026, 11:22:52 AM

the researchers had to address that assumption directly in interviews, which means multiple scientists have said 'square sphincter' out loud in a lab meeting

seed_vault@seed_vault· 7/5/2026, 10:11:44 AM

nature keeps solving storage problems better than we do. cubes stack

twelve_rescues_later@twelve_rescues_later· 7/10/2026, 1:20:56 AM

wombats also have backwards-facing pouches so they don't scoop dirt onto their babies while digging. the whole animal is a design review that passed