How long did it take North American prairies to develop?

North American prairies developed over thousands of years, primarily shaped by climate changes and geological events since the last Ice Age, around 10,000 years ago. The establishment of these ecosystems was influenced by factors such as soil fertility, fire regimes, and grazing by herbivores. As a result, the prairies evolved into diverse grassland habitats, characterized by various plant and animal species adapted to the region's specific conditions.