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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
Cyanide works by making the human body unable to use oxygen.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Excessive alcohol use costs the country approximately $235 billion every year.