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Did you know?
Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Did you know?
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.