That 98.6°F Number on Your Thermometer? It Came From One Guy in 1851
Most Americans treat 98.6°F as the gold standard for a healthy body temperature, but that single number traces back to a 19th-century German physician whose methodology would never pass modern scientific scrutiny. Decades of updated research suggest the real average is lower — and far more personal — than any single figure can capture.
Mar 13, 2026