probably mesozoic era
Vertebrates first appeared during the Paleozoic era.
the cenozoic era
Pre-Cambrian. It's when bacteria first came about.
Actually they were from the Pennsylvanian Period and the Paleozoic Era...
Silurian
The Cenozoic era at about 65 million years ago. The Paleogene period.
9500 BC. When the switch between the Paleolithic Era to the Neolithic Era began.
Reptiles first appeared during the Paleozoic Era, specifically the Carboniferous System of the Paleozoic Era. That was about 320 million years ago.
before time even started when mesopotamians were alive.
Early man first appeared in the Cenozoic Era, specifically during the Quaternary Period. This era began around 2.6 million years ago and continues to the present day.
Mammals first appear in the fossil record of the Mesozoic Era.
somewere about 100 to odd the first cartoon came out in the silent film era 1919