|
|
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 over 65,000 known species of protozoa. About 10,000 species are parasitic.
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
![In 1891 William Dean Howells championed the poetry of Emily Dickinson: “This poetry is as characteri](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_14_04_22438726.jpeg)
![Angry jeers from whites rain down on Elizabeth Eckford, one of the first African American students ...](https://biology-forums.com/gallery/47/medium_632960_01_12_16_11_27_12_241881129.jpeg)