A 2020 study from Stanford University has found that human body temperature - previously standardised at 37°C - has been steadily declining over the last 200 years or so.

Using historical records, the research team found that the current average body temperature is probably now around half a degree lower.

[…] we determined that mean body temperature in men and women, after adjusting for age, height, weight and, in some models date and time of day, has decreased monotonically by 0.03°C per birth decade.“

See: Decreasing human body temperature in the United States since the industrial revolution

The drop is currently unexplained, but suggestions include : decline in physical activity, the effects of antibiotics, improved hygiene & etc.

Also see :Thermoregulationplugin-autotooltip__plain plugin-autotooltip_bigThermoregulation

"The core temperature of a human is regulated and stabilized primarily by the hypothalamus, a region of the brain linking the endocrine system to the nervous system, and more specifically by the anterior hypothalamic nucleus and the adjacent preoptic …

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