The only recorded instances of this phenomenon come from Cameroon, occurring at Lake Monoun in 1984, and Lake Nyos two years after, although there is fossil evidence suggesting similar events in Eocene Germany, 47 million years ago.he resulting cloud killed 37 people who were living near the lake. At Lake Nyos, in 1986, a similar disaster occurred, in this case killing between 1,700 and 1,800 people, and uncounted numbers of livestock and other animals.
The engagement ring is placed on the third finger of the left hand since in ancient times this finger was believed to be the only one with a vein running directly to the heart. Therefore, it was believed that a ring on this finger would ensure a long and loving marriage.
An engagement ring is given to someone at the time of a marriage proposal. Traditionally, women receive the engagement ring and are expected to wear it starting from the time of the proposal. Having a ring on her finger will indicate to the world that she is taken and is committed to her partner. These rings can vary greatly in terms of extravagance and price, but the most common type of engagement ring has a diamond or another gemstone set atop a pretty band.