A French physicist has won an Ig Nobel Prize for using mathematical formulas to determine whether cats are liquid or solid.
The Ig Nobel prizes are awarded every year by Improbable Research, an organization devoted to science and humor. The goal is to highlight scientific studies that first make people laugh, then think.
A ceremony is held every year at Harvard University.
Marc-Antoine Fardin was awarded the Ig Nobel Prize in physics for his research paper on the rheology of cats.
"At the center of the definition of a liquid is an action: A material must be able to modify its form to fit within a container," Fardin said.