The Physics Of Penguin Poop

Benno Meyer-Rochow, of the International University of Bremen, Germany, and Jozsef Gal from Loránd Eötvös University in Hungary found that adult penguins generate a pressure up to 60 kPa (450 mm Hg) to expel their faeces, which equals about twice the pressure of an ordinary car tire and is considerably higher than that of other birds.
(via)