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The surprising physics of cats’ drinking
“It has taken four highly qualified engineers and a bunch of integral equations to figure it out, but we now know how cats drink.” (the New York Times)

Yesterday, Perdo M. Reis and Roman Stocker from the MIT, together with Sunghwan Jung (Virginia Tech) and Jeffrey M. Aristoff (Princeton) solved the mystery. They say that the cat’s lapping method depends on its instinctive senses of gravitational force and inertia. The 1m/s speed of the animal’s tongue allows it to lap 4 times per second, making the process too fast for the human eye to see.
Here is how it works:
- First, the cat touches the surface of the liquid with the tip of its tongue
- Its tongue then races back at such speed that the liquid is pulled up into the air
- When it reaches its highest point and starts to fall, the cat catches the liquid in mid air and gulps it down
(I invite you to read the full article on the MIT’s website.)