A team of researchers from Stanford University (USA) analyzed a lot of data on medical measurements of human temperature in the 19th, 20th and 21st centuries and came to the conclusion that we are getting colder. Moreover, the difference is quite noticeable and already reaches at least half a degree on the Celsius scale. And this raises the question - what causes such metaphoses?
Initially, the temperature of a healthy human body was determined by the German physician Karl Reinhold August Wunderlich in 1851 - the same famous 36.6 ℃. And although he used a simple thermometer with a rough scale, Wunderlich was so carried away that he examined tens of thousands of patients, taking millions of measurements. As a doctor, he measured and compared temperatures in the morning and in the evening, examined the well-fed and hungry, adults and children, and especially healthy people with various ailments. And therefore, even after more than a century and a half, his conclusions are accurate.
But Stanford believed that the problem is not in the measurements, but in the human body itself, which, although slowly, is evolving. Scientists took data from veterans of the American Civil War (1880s), plus records from the national health system of the 1970s and, finally, their own clinical studies of the early 2000s. A total of about half a million values with confirmed measurement accuracy.
It turned out that body temperature in men has dropped by 0.59 degrees Celsius since the late 1800s - it has decreased by about 0.03 degrees in a decade. In women, the indicators are lower, a drop of 0.33 degrees, but it is also clearly visible. Now scientists have to understand what exactly led to such changes: diet, climate, medical care, anthropogenic factors?