Population ecology is the study of how populations — of plants, animals, and other organisms — change over time and space and interact with their environment. Populations are groups of organisms of ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

The economic impact of changes in population growth rates and age structure can dramatically shift as countries transition from high to low rates of mortality and fertility. Initially, mortality ...