Cyclones are a common phenomenon along the eastern coast of India at this time of year.
"This is a common phenomenon, and it's definitely a field for anticorruption work, " says Li Chengyan, director of Peking University's Research Center for Government Integrity.
Migration from developed to developing countries has been a common phenomenon, however recent evidence shows that there is a growing incidence of migration from one developing country.
"Thus, while hangover is a common phenomenon among college drinkers, for most of them it occurs rarely enough that it is unlikely to have a major deleterious impact on academic performance, " Dr Slutske said.
The situation is worsened by the fact that each change of government - a common phenomenon these days - produces more sets of ex-ministers and ex-MPs determined to hang on to what they have.
Prof Jane Cowen, an expert in social anthropology at Sussex University, says there are many communities where "the sense of self is intensified by sense of difference with others" and it is a common phenomenon.
That is not a common enough phenomenon at Old Trafford, according to Ian Stirling, vice chairman of the Independent Manchester United Supporters Association.
It needs to include smart, truly independent experts- and exclude people who have built their careers by touting shaken baby syndrome as a proven common phenomenon.
New York, Atlanta and Salt Lake City are poster cities for a phenomenon common to cities in industrialized nations: They create their own weather.
But these numbers are challenged by the opponents of abortion, who argue that it is a rare phenomenon in the developing world, and that legalising it will make it more common.
While GLOFs are not a new phenomenon, according to UNEP, there is evidence that they are becoming more common as glaciers retreat, putting in danger the towns and villages that lie beneath them.
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