Name the shortest and longest era.

The longest era is the Stone Age. It began 2.6 million years ago and ended about 5-6 thousand years ago. The Stone Age is also divided into 3 periods: Paleolithic, Mesolithic, Neolithic. These periods also have their own time frames.
Accordingly, the shortest era is modern time. However, modern times continue to this day and it is not known how our descendants will arrange the future world and how the next era will be called. In modern times, everything is going fast and swiftly, and it is developing just as quickly. People invented weapons, computers, telephones, televisions, etc. Our world is moving towards even higher discoveries.