It is about 251 million years ago
The Precambrian Era began in the time period 4600 and ended in 570.
It began 4.6 billion years ago and ended 544 million years ago.
In the paleolithic era.
The Modern Era
Define "Swing" riot.
It was called the Swing Era or the Big Band Era>
Early forms of swing were popular in the late 1920s but the "swing era" is generally considered to have run from around 1934 to 1945.
There is no predefined "Technology era".
· eastern swing
Swing Era. Specifically, known for his big band although a fine pianist.
Glenn Millers Band performed during the swing era of the big band sound.
Swing era of the 1930s and the 1940s
the mesoproterozoic was an era itself not a period.