The horizontal fraction bar was introduced by the Arabs.
Did you know?
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
Did you know?
Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Polar covalent bonds in water molecules
The skimmers or perchers and their relatives form the Libellulidae, the largest dragonfly family in
Triton’s South Polar Cap
This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued