The physics of how cats drink

An unfunded, seemingly just-for-fun study of how cats drink was recently carried out. Results show that they only touch their the surface of their tongues to the water. They use inertia to bring the water into their mouths, closing their jaws before the counter-acting force of gravity takes hold. The rate at which cats lap matters, which is a testament to evolution, of course. Interestingly, one model the researchers used predicted that larger cats would lap at slower rates. It turns out that that is true. But what I find interesting is utilization of social tools by the researchers to find their results.

“It occurred to me that there were some interesting biophysics behind that process,” Stocker said.

So he borrowed a high-speed video camera from his lab and taped Cutta Cutta drinking. With several other curious researchers along for the ride, Stocker analyzed those videos, along with video collected from Zoo New England and YouTube.com videos of lions, tigers and other big cats drinking.

“It seems to be that this is the first study in Science that uses YouTube as part of the research,” Stocker said.

The model also allowed the researchers to predict that larger cats would need to lap slower to strike a balance between the inertia and gravity of the water picked up by their tongues. Sure enough, the videos showed that lions and tigers lap less than 2 times per second, about half the rate of domestic cats.

YouTube, Facebook, Twitter…like it or not, they and their analogues are the future. (And personally, I like it.)

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3 comments on “The physics of how cats drink

  1. My cat sticks her paw in the water, then licks it off there.
    One of my earlier cats would only drink from the tap.

    Guess our cats are just out of the evolutionary loop 😛

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