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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.
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
![A schematic representation of the convergence of cones and rods on retinal ganglion cells. There is ...](https://biology-forums.com/gallery/30/medium_548020_05_06_17_11_21_54_3029189.png)
![The distribution of cones and rods over the human retina. The figure illustrates the number of cones ...](https://biology-forums.com/gallery/30/medium_548020_05_06_17_11_21_54_302921286.png)