Here are two drawing of penguins.
The other drawing is from the Ig Nobel Prize-winning biology research study “Pressures Produced When Penguins Pooh — Calculations on Avian Defaecation,” published in the journal Polar Biology, vol. 27, 2003, pp. 56-8.
Can you tell which drawing is which?
(Thanks to Jillian Buriak for bringing this to our attention.)