It's not a fixed number of years, but figuring 3-4 generations per century is a pretty reasonable estimate.
This of course refers to human generations - animals, plants, bacteria, viruses all have varying generation periods. The following website, however, argues that humans started out with a generation length of 930 years. I'm not sure which database they rely on for their information!:
http://www.millennium-ark.net/NEWS/10_Prophecy/100104.last.generation.html
The fruit fly, Drosophila melanogaster, for instance, has a generation length of around ten days, which is why it is so widely used for genetic research.
A generation is usually considered to be forty years.
Additional Information:Hebrew dor refers to the life cycle of an individual, either from birth to death or from birth to birth of the first child. Genesis 15:13-16 apparently equates 400 years with four generations, thus, 100 years per generation.Numbers 32:11-13 may reckon a generation as 60 years, including people 20 and above and giving them 40 more years to live. One may interpret this to mean a generation is the 40 years of adulthood between the ages of 20 and 60.
Job lived 140 years and saw four generations (Job 42:16). This would make a generation about 35 years. Basically, generation is not a specific number of years but a more or less specific period of time.
A generation can be defined differently by different disciplines. In genealogy, it can be anywhere from 25-30 years, depending on the source used. In any event, it is no less than 25 years and no more than 30 years.
It should be about 20 years or so. Maybe 5 years less or more, depending on countries and epochs.
Usually between 20-30
One generation is twenty years.
One generation is twenty years.
One generation is 25 years.
20 years determine a generation.
There is no specific definition. Many people use 20 years as a general estimate, but it varies. Some use 25 years and some are beginning to use 33 years. A father can be 60 years older than his son and that would make that generation 60 years.
Last Generation was created in 2005.
One generation is 28 years so that is 10,226.79 days.
Yes, the Girls' generation members have been living together and working together for about the last 10 years.
33, I think
The Last Generation in England was created in 1849.
generation X
The last generation