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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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.
In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.