Its usually something big, like an invention that changed the world. For example, the Neolithic age started when people invented farming and domestication. That invention changed the world, and still impacts our every day lives.
The modern age of space exploration began in 1957 with the launch of the Soviet satellite Sputnik. This event marked the start of a new era in which various countries competed to explore space and achieve significant milestones, such as manned space missions and moon landings.
what do the largest clumps surrounding the protosun to begin to form
An epoch is typically smaller than an era or a period in geological or historical scales.
Because in that era they had a TIME MACHINE that they took and went back to the first era where the cavemen were fascinated by the machine that they killed them and stole it and went back to the third era and they took hostages back with them so yeah they did make it
The reliable instrument record for climate variables typically begins around the late 19th to early 20th century, when instruments such as thermometers and barometers became widely used and standardized for measuring temperature, pressure, and other key variables. This period is often referred to as the modern instrumental era of climate data collection.
9500 BC.
the mesoproterozoic was an era itself not a period.
Classical era
in the era of awesomeness when dinosaurs were alive.
The swing era in jazz started in the year of 1935
The NHL's modern era began in 1992.
In China the era of dynasties started in 2100 BC
Mesolithic
1811
1824
The beginning of Earth's current era is marked by a mass extinction.
2000bc