| Answer | Crossword Clue |
|---|---|
| EOCENE | Epoch of modern birds and mammals |
| EOCENE | Epoch that saw the dawn of modern mammals |
| EOCENE | Epoch when modern mammals appeared |
| EOCENE | Epoch when modern mammals arose |
| EOCENE | Epoch in which modern mammals emerged |
| EOCENE | Epoch in which modern mammals first emerged |
