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In population biology and demography, generation time is the average time between two consecutive generations in the lineages of a population.In human populations, generation time typically has ranged from 20 to 30 years, with wide variation based on gender and society.
Generation Z: 1995-2009 (age 16-30) Gen Alpha: 2010-2024 (age 15 and younger) What will the next generation be called, after Gen Beta?
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
Gen Beta will be the seventh generation since generations started being named in 1901, with the Greatest Generation. With the start of a new year on Jan. 1, 2025, comes the emergence of a new ...
Human population projections are attempts to extrapolate how human populations will change in the future. [2] These projections are an important input to forecasts of the population's impact on this planet and humanity's future well-being. [3] Models of population growth take trends in human development and apply projections into the future. [4]
The greatest generation (hero archetype), also known as the G.I. generation and the World War II generation, is the demographic cohort following the lost generation and preceding the silent generation. Strauss and Howe define the cohort as individuals born between 1901 and 1924.
The word generate comes from the Latin generāre, meaning "to beget". [4] The word generation as a group or cohort in social science signifies the entire body of individuals born and living at about the same time, most of whom are approximately the same age and have similar ideas, problems, and attitudes (e.g., Beat Generation and Lost Generation).
Population growth rate (2023, Our World in Data) [1] Absolute increase in global human population per year [2] Population growth is the increase in the number of people in a population or dispersed group. The global population has grown from 1 billion in 1800 to 8.2 billion in 2025. [3]