scholars such as Aurélien Sauvageot and Denis Sinor to carry out more detailed investigation of the hypothesis, which so far has failed to yield generally accepted results. Nicholas Poppe in his article The Uralo-Altaic Theory in the Light of the Soviet Linguistics (1940) also attempted to refute Castrén's views by showing that the common agglutinating features may have arisen independently. Beginning in the 1960s, the hypothesis came to be seen even more controversial, due to the Altaic family itself also falling out universal acceptance. Today, the hypothesis that Uralic and Altaic are related more closely to one another than to any other family has almost no adherents. In his Altaic Etymological Dictionary, co-authored with Anna V. Dybo and Oleg A. Mudrak, Sergei Starostin characterized the Ural–Altaic hypothesis as "an idea now completely discarded". There are, however, a number of hypotheses that propose a larger macrofamily including Uralic, Altaic and other families. None of these hypotheses has widespread support. In Starostin's sketch of a "Borean" super-phylum, he puts Uralic and Altaic as daughters of an ancestral language of c. 9,000 years ago from which the Dravidian languages and the Paleo-Siberian languages, including Eskimo–Aleut, are also descended. He posits that this ancestral language, together with Indo-European and Kartvelian, descends from a "Eurasiatic" protolanguage some 12,000 years ago, which in turn would be descended from a "Borean" protolanguage via Nostratic. In the 1980s, Russian linguist (Nikolai Dmitrievich Andreev) proposed a "" hypothesis linking the Indo-European, Uralic, and Altaic (including Korean in his later papers) language families. Andreev also proposed 203 lexical roots for his hypothesized Boreal macrofamily. After Andreev's death in 1997, the Boreal hypothesis was further expanded by Sorin Paliga (2003, 2007). Angela Marcantonio (2002) argues that there is no sufficient evidence for a Finno-Ugric or Uralic group connecting the Finno-Permic and Ugric languages, and suggests that they are no more closely related to each other than either is to Turkic, thereby positing a grouping very similar to Ural–Altaic or indeed to Castrén's original Altaic proposal. This thesis has been criticized by mainstream Uralic scholars. Typology There is general agreement on several typological similarities being widely found among the languages considered under Ural–Altaic: head-final and subject–object–verb word order in most of the languages, vowel harmony morphology that is predominantly agglutinative and suffixing zero copula non-finite clauses lack of grammatical gender lack of consonant clusters in word-initial position having a separate verb for