ترشیاری

The Tertiary is an outdated geological term that scientists once used to describe the time period from about 66 million to 2.58 million years ago, when mammals diversified and became dominant on Earth following the extinction of dinosaurs. While geologists no longer officially use this term, it matters historically because it was central to how scientists organized and understood Earth's deep past for many decades.

AI-generated from the Wikipedia summary — may contain errors.