The eusthenopteron was a prehistoric fish that had limbs. It lived in a warm, tropical environment and liked to live in still water.
we live in modern era.
We live in the Cenozoic era.
We live in the cenozoic era. The Quarternary period. Also in the 5th era.
Eusthenopteron is a link in a chain of evidence supporting evolution. Transitional forms have been found that are elements of its development from a fish that lived entirely in the ocean to the tetrapods that walked on land. These progressive changes spanned million of years in the late Devonian, from the fish Eusthenopteron, through Tiktaalik, and Acanthostega, to the oldest known tetrapod, Ichthyostega. Eusthenopteron was fish in the ocean, but a portion of that ocean became landlocked and is now part of Pennsylvania. In Darwin's evolution there are mechanisms for development of new genetic information. One of them is described by Ilya Prigogine. Another is Lamarck's evolution (this requires a feedback loop), which is a subset of Darwin's evolution. A third is... well, I'll leave it to you to research on your own.
the modern era
The Cenozoic.
The Cenozoic era.
We live in the Cenozonic Era and the Holocene Epoch.
We live in the Holocene Epoch, of the Quaternary Period, in the Cenozoic Era
neolithic era
The Elizabethan era