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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.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.
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.
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
![The Scopes Trial: William Jennings Bryan (right) represented the state of Tennessee, and Clarence Da](https://biology-forums.com/gallery/47/medium_273800_20_01_15_12_32_48_202021970.jpeg)
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