From Mercury to Infrared: The Evolution of Temperature Measurement

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2026-09-28 05:22:26 -

For most of medical history, taking a patient's temperature meant placing a glass mercury thermometer under the tongue and waiting several minutes. It was simple, reliable, and universally understood. It was also fragile, slow, and toxic if broken. Mercury is a potent neurotoxin, and the World Health Organization led a global effort to phase out mercury-containing medical devices. That...

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