Magnesium, a very useful metal, is abundant in the earth. The greatest source of magnesium, however, is not the earth but the oceans. Processes have been developed to economically extract magnesium from seawater. This makes the valuable metal readily available to countries that border the oceans. B.C. Although little is known of his life, his name is still with us.
Lapis lazuli is a dark blue stone used as a decoration and as a gemstone.
According to Greek mythology, Aesculapius was the god of medicine. Until the advent of sonar devices used by submarines to detect underwater sounds made by enemy submarines, the sea had been thought of as a silent world. There are people who consider that their critics are fools incapable of discerning judgement, but they are sure that anyone who praises them is a perceptive and insightful individual. The information gap is one factor responsible for failure to meet the needs of large numbers of people in the world. Tibet is a small, remote country in Central Asia.