they last like 65million years
forever
About 300 years
Around 70 years
almost 2011 years (its the era we are in)
65 million years
20 years
This period lasted from about 1800-1850.
The Cenozoic Era lasted 65.5 million years ago to the present day!
It lasted more than a few years
The Paleozoic Era Lasted about 2799. You can add all the numbers of the: Permian, Carboniferous, Devonian, Silurian, Ordovician, and the Cambrian. Add all of there numbers of how long each era lasted. So that's how long the Paleozoic Era Lasted ("2799")
The Permian period is the last period of the Paleozoic era