Anatomically modern human hunter-gatherer migration into Southeast Asia before 50,000 years ago has been confirmed by the combined fossil record of the region. These immigrants might have, to a certain extent, merged and reproduced with members of the archaic population of "Homo erectus", as the fossil discoveries in the Tam Pa Ling Cave suggest. Data analysis of stone tool assemblages and fossil discoveries from Indonesia, Southern China, the Philippines, Sri Lanka and more recently Cambodia and Malaysia has established "Homo erectus" migration routes and episodes of presence as early as 120,000 years ago and even older isolated finds date back to 1.8 million years ago. Java Man ("Homo erectus erectus") and "Homo floresiensis" attest for a sustained regional presence and isolation, long enough for notable diversification of the species' specifics.