Dry ice is frozen carbon dioxide. The gas version of carbon dioxide is pressurized and then turned into the liquid version of carbon dioxide. The liquid is then injected into block presses or pelletizers, (which will hold the shape of the dry ice) that release the pressure so that the liquid will turn into a solid. It’s converted into dry ice snow sometimes, but that doesn’t last long since dry ice melts faster than regular ice. The use of dry ice was first recorded by a French chemist in 1835. He had the carbon dioxide in a large cylinder to observe the liquid from. It then evaporated and left a solid block of dry ice. Since then, it was studied for the next 60 years, without really having any reasoning. The dry ice back then was not for