Cats
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2025
1 article2024
3 articles- Why Cats Purr at 25 Hz: Vocal Fold Pads and the Physics of Self-Sustained Oscillation A 2023 Current Biology experiment showed that excised cat larynges can produce purr-like low-frequency oscillations under airflow without neural input. Connective-tissue pads are a plausible contributing mechanism, not a settled complete account; frequency overlap does not establish bone healing in cats.
- How Cats Drink: Inertia, Gravity, and the Froude Number at the Tip of a Tongue Cats use the dorsal surface of the tongue tip to entrain a liquid column, then close the jaw before gravity and pinch-off remove it. Reis and colleagues modelled the timing with inertia, gravity, a Froude number, and the tongue’s travel geometry. The relevant domestic-cat parameter is a modified Froude number near 0.4—not the simple Froude number near one.
- Are Cats Liquid? The Deborah Number and the Rheology of Cats Marc-Antoine Fardin won the 2017 Ig Nobel Prize for a playful application of rheological language to cats. The Deborah number De = τ/T is a standard timescale ratio for materials; assigning a cat a relaxation time is an analogy, not a rigorous material classification.