The horizontal fraction bar was introduced by the Arabs.
Did you know?
Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
Did you know?
The FDA recognizes 118 routes of administration.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.