subdivisioning of Eurasiatic varies by proposal, but usually includes Turkic, Tungusic, Mongolic, Chukchi-Kamchatkan, Eskimo–Aleut, Indo-European, and Uralic. Greenberg enumerates eight branches of Eurasiatic, as follows: Turkic, Tungusic, Mongolic, Chukchi-Kamchatkan, Eskimo–Aleut, Etruscan, Indo-European, "Korean-Japanese-Ainu", Nivkh, and Uralic–Yukaghir. He then breaks these families into smaller sub-groups, some of which are themselves not widely accepted as phylogenetic groupings. Pagel et al. use a slightly different branching, listing seven language families: Mongolic, Tungusic, Turkic, Chukchi-Kamchatkan, Dravidian, "Inuit-Yupik"—which is a name giving to LWED grouping of Inuit (Eskimo) languages that does not include Aleut —Indo-European, Kartvelian, and Uralic. Murray Gell-Mann, Ilia Peiros, and Georgiy Starostin group Chukotko-Kamchatkan and Nivkh with Almosan instead of Eurasiatic. Regardless of version, these lists cover the languages spoken in most of Europe, Central and Northern Asia and (in the case of Eskimo-Aleut) on either side of the Bering Strait. The branching of Eurasiatic is roughly (following Greenberg): Indo-European (unity undisputed) Uralic (unity undisputed) Yukaghir (sometimes grouped under Paleosiberian, linked to Uralic by Greenberg) Paleosiberian (sub-grouping almost universally considered a term of convenience; members are considered Eurasiatic regardless of subgroup's validity) Nivkh (a language isolate; placed under Palaeo-Siberian by Starostin, not always included even within Nostratic) Eskimo–Aleut (unity undisputed) Chukotko-Kamchatkan (Chukotian) (unity undisputed) Macro-Altaic (controversial; Roy Andrew Miller 1971, Gustaf John Ramstedt 1952, Matthias Castrén 1844; "Macro-Altaic" has less scholarly acceptance than "Micro-Altaic" or Altaic proper, uniting only Turkic, Mongolic and Tungusic) Micro-Altaic (unity disputed) Turkic (unity undisputed) Mongolic (unity undisputed) Tungusic (unity undisputed) Japonic (unity undisputed) Japanese Ryukyuan Korean (language isolate) Ainu (considered an isolate by almost all save Greenberg) Tyrsenian (grouping of three closely related extinct languages; their affiliation with Eurasiatic, based primarily on "mi" first person singular, is highly speculative given lack of attestation) Etruscan (extinct) Raetic (extinct) Lemnian (extinct) Jäger (2015) A computational phylogenetic analysis Jäger (2015) provided the following phylogeny of language families in Eurasia: Geographical distribution Merritt Ruhlen suggests that the geographical distribution of Eurasiatic shows that it and the Dené–Caucasian family are the result of separate migrations. Dené–Caucasian is the older of the two groups, with the emergence of Eurasiatic being more recent. The Eurasiatic expansion overwhelmed Dené–Caucasian, leaving speakers of the latter restricted mainly to isolated pockets (the Basques in the Pyrenees Mountains, Caucasian peoples in the Caucasus Mountains, and the Burushaski in the Hindu Kush Mountains) surrounded by Eurasiatic speakers. Dené–Caucasian survived in these areas because they were difficult to access and