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.In his official research paper, Fardin discusses many factors including relaxation time, experimental time, the type of container, and the cat's degree of stress.The conclusion? Cats can be either liquid or solid, depending on the circumstances, Fardin reported in the Rheology Bulletin in 2014 Watch the video below: