Are Cats Liquid?

Every year I celebrate April Fool’s Day (April 1) by highlighting the lighter side of science.

Rheology is the branch of physics that deals with the flow of matter, primarily liquids.  A recent issue of “The Rheology Bulletin” includes a scholarly article titled… wait for it…

“On the Rheology of Cats.”

Author Marc-Antoine Fardin (Université de Lyon, France) notes the ability of cats to mold themselves to fit into various containers, from boxes to glass bowls.  “A cat appears as a solid material with a consistent shape rotating and bouncing, like Silly Putty on short time scales,” he writes.  “At longer time scales, a cat flows and fills an empty wine glass.”

Fardin documents “a reliable technique to load Felis catus in different geometries”:

  1. Bring an empty box.
  2. Wait.

Empirical evidence that cats are liquid


Fardin’s work follows up on a previous article posted on

15 Proofs That Cats Are Liquids.”

“Liquids take the shape of the container while maintaining a constant volume,” the article states. “That’s it.  So cats are liquids.”

Isn’t science wonderful?

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