There may be no single cause of bipolar disorder (aka manic depression). Instead, research indicates the causes of bipolar disorder are probably a combination of biochemical, genetic and environmental factors that may trigger and perpetuate the chemical imbalances in the brain.
Net worth: $829 million. Telecommunications mogul Strive Masiyiwa is widely regarded as the richest man in Zimbabwe and is one of the richest men in Africa with a net worth of more than US$800 million.
10 million Zimbabwean Dollars = US$4. If you think the American economy is bad, take heart that itâs nowhere near the ultra-super-hyperinflation in Zimbabwe, once one of the richest countries in Africa. The countryâs central bank has recently issued a Z$100 billion note (yes, Z$100,000,000,000).