The first day of meteorological winter. Out in the park, the crew has finished setting up the orange plastic fencing and foam padded fence posts wrapped in layers of duct tape to prepare Rotary Hill for safe sledding. Across the DuPage River, a large grassy area has been enclosed by wooden boards to form ice skating and hockey rinks.
The weather forecast: 16 C.
Meanwhile, in northern Canada air temperature is -40 C (also -40 F, being the point at which the two scales converge). The Celsius scale was adopted by most countries in the mid to late twentieth century to replace the Fahrenheit scale. When will the US officially join the scientifically literate metric world?