>>A new study by a team of Stanford University School of Medicine scientists suggests that the average human body temperature in the United States has decreased over the last century. By cross-checking a variety of health records, the researchers concluded that the average American’s body temperature is about 0.58° F (0.03° C) and 1.06° F (0.6° C) lower for women and men, respectively, than it was in the 19th century.<<
>>In all, the team went through 677,423 temperature measurements, making sure that temperatures recorded were accurate rather than the result of poorly designed thermometers. They did this by looking at the change in temperature inside each group over time to ensure that the curves showing a decrease were consistent between the datasets.<<
>>As to why this is happening, the researchers say that the most likely mechanism is a reduction in the human metabolic rate due to environmental factors. One possibility is that improvements in public health over 200 years have reduced the incidence of inflammations, which boosts metabolism. This, combined with people living more comfortable lives in more stable environments means that the body doesn’t have to work as hard to stay warm, so the average temperature falls.<<
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https://newatlas.com/science/humans-body-temperature-decrease/