Why 98.6 Degrees? Our Body Temperature Strikes a Perfect Balance

 

Standard human body temperature is 98.6 degrees Fahrenheit: It’s one of those numbers from grade school science textbooks—like 65 million years since the dinosaur extinction or nine eight planets in the solar system—that just gets stuck in your head. But why should it be that balmy temperature and no other?

According to a study by researchers at Albert Einstein College of Medicine, the 98-degree range is in perfect balance.

Every one degree Celsius rise in body temperature wards off about 6 percent more fungal species. So tens of thousands of fungi can infect reptiles and amphibians, but we can only be invaded by a few hundred fungi. In the new work, the researchers created a mathematical model that weighed the fungal protection benefits versus the metabolic cost of high body temperature. And the optimal temperature was 98.1, quite close to what evolution figured out. [Scientific American]

 

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