It has been suggested that the Bronze Age Trialeti-Vanadzor culture and sites such as the burial complexes at Verin and Nerkin Naver are indicative of an Indo-European presence in Armenia by the end of the 3rd millennium BCE. The controversial Armenian hypothesis, put forward by some scholars, such as Thomas Gamkrelidze and Vyacheslav V. Ivanov, proposes that the Indo-European homeland was around the Armenian Highland. This theory was partially confirmed by the research of geneticist David Reich (et al. 2018), among others. Similarly Grolle (et al. 2018) supports not only a homeland for Armenians on the Armenian highlands, but also that the Armenian highlands are the homeland for the "pre-proto-Indo-Europeans".