Common sense has always told us that a person's normal body temperature is about 37 ℃, but why is it that everyone around us has a body temperature below 37 ℃?

Stanford University School of Medicine professor Julie Parsonet and her team have just released a research finding that the average body temperature of adults has been continuously decreasing since the 19th century, dropping by 0.4 ℃ in less than 200 years, from 37 ℃ to 36.6 ℃.