Punctuated equilibrium

Punctuated equilibrium is a theory in evolutionary biology that suggests species remain relatively stable for long periods, with most change occurring suddenly in quick bursts. These rapid changes often happen after environmental shifts or disturbances, leading to new species forming quickly rather than gradually over time. Between these events, species experience long periods of stability with little change. This model contrasts with the idea of slow, steady evolution, emphasizing that evolution often happens in rapid episodes separated by long periods of stability.