Physically many cats are able to get pregnant as young as only six or seven months old. However, it is better and healthier for pregnancy to occur when they're a little older. Often younger cats are not good mothers; the maternal instinct seems to be better developed when they're one year or older.
Initially, all modern linguistics was historical in orientation. Even the study of modern dialects involved looking at their origins. Ferdinand de Saussure 's distinction between synchronic and diachronic linguistics is fundamental to the present day organization of the discipline.
This particular aspect of the discipline of historical study, however, is now subject to a process of great change. Historiansâ interaction with archives has been dominated by the need to identify the range of material within collections, to access relevant documents, and to interpret their contents productively. By no means does all investigation of the past require the consultation of the written word.