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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).
Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
![The location of the variable fuel sensor can vary, depending on the make and model of vehicle, but ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_3_34_44_295202468.png)
![Typical port fuel-injection system, indicating the location of various components. Notice that the ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_11_26_22_299951593.png)