When you need to check temperature — whether it’s for your fever, cooking meat, or checking the weather — you’ll use one of two common scales: Celsius (also known as centigrade) or Fahrenheit. A third scale, Kelvin, exists but is typically reserved for extreme temperatures found in places like deep space. These two primary scales work very differently — water turns to ice at 0° Celsius but at 32° Fahrenheit. Surprisingly, these two scales meet at exactly one point: negative 40 degrees. This happens because each Celsius degree covers more ground than a Fahrenheit degree, causing them to eventually cross paths —…
