Yamnaya culture people originating from the Pontic–Caspian steppe north of the Black Sea and that the DNA of copper-age Europeans matched that of the Yamnaya. Bronze age Greece A 2017 archaeogenetics study of Mycenaean and Minoan remains published in the journal Nature concluded that the Mycenaean Greeks were genetically closely related with the Minoans but unlike the Minoans also had a 13-18% genetic contribution from Bronze Age steppe populations. Anatolian hypothesis Luigi Luca Cavalli-Sforza and Alberto Piazza argue that Renfrew and Gimbutas reinforce rather than contradict each other. states that "It is clear that, genetically speaking, peoples of the Kurgan steppe descended at least in part from people of the Middle Eastern Neolithic who immigrated there from Turkey." state that: Spencer Wells suggests in a 2001 study that the origin, distribution and age of the R1a1 haplotype points to an ancient migration, possibly corresponding to the spread by the Kurgan people in their expansion across the Eurasian steppe around 3000 BC. About his old teacher Cavalli-Sforza's proposal, states that "there is nothing to contradict this model, although the genetic patterns do not provide clear support either", and instead argues that the evidence is much stronger for Gimbutas' model: Iranian/Armenian hypothesis David Reich (2018), noting the presence of some Indo-European languages (such as Hittite) in parts of ancient Anatolia, argues that "the most likely location of the population that first spoke an Indo-European language was south of the Caucasus Mountains, perhaps in present-day Iran or Armenia, because ancient DNA from people who lived there matches what we would expect for a source population both for the Yamnaya and for ancient Anatolians." Yet, Reich also notes that "...the evidence here is circumstantial as no ancient DNA from the Hittites themselves has yet been published." Kristian Kristiansen, in an interview with Der Spiegel in May 2018, stated that the Yamnaya culture may have had a predecessor at the Caucasus, where "proto-proto-Indo-European" was spoken. Recent DNA-research has led to renewed suggestions of a Caucasian homeland for the 'proto-Indo-Europeans'. According to Kroonen et al. (2018), Damgaard et al. (2018) ancient Anatolia "show no indication of a large-scale intrusion of a steppe population." They further note that this lends support to the Indo-Hittite hypothesis, according to which both proto-Anatolian and proto-Indo-European split-off from a common mother language "no later than the 4th millennium BCE." states that "the Armenian plateau hypothesis gains in plausibility" since the Yamnaya