The geological time period that encompasses the last 2.6 million years, characterized by the development of humans and significant changes in climate and environments.

चतुर्थकालीय युग

English Usage: The Quaternary era is notable for the evolution of modern humans.

Hindi Usage: चतुर्थकालीय युग आधुनिक मानवों के विकास के लिए प्रसिद्ध है।