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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
There are more sensory neurons in the tongue than in any other part of the body.
Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
![Examples of USP labels Source: Courtesy of Novartis Pharmaceuticals Corporation and Mallinckrodt Pha](https://biology-forums.com/gallery/47/medium_46687_08_12_14_4_52_49_19512932.jpeg)
![(a) A turbidometry detector measures laser light directly across from the light source. The sample, ...](https://biology-forums.com/gallery/31/medium_398119_11_07_17_6_30_43_31547437.jpeg)
![Cover and secure the cold source in place. Wrap the cold source using a towel or elastic bandage to ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_6_33_38_33286201.jpeg)