The genetic spread of modern humans started in Central-Asia Mid-Siberia.
It was a result of hybridization between clever but small brained Denisovans and stupid but big brained Neanderthals. Denisovans got their super brain from Homo floresiensis. But the "trouble" (for the conventional view) with floresiensis is that s/he had a "too small brain" for her/his actual achievemnet (this same text written in Finnish or most other non-semitic non indoeuropean languages would not have needed this stupid sex segregation s/he or her/his!). But it fits elegantly in
Klevius theory.
Here in Denisova Siberia a 40,000-80,000 year old finger was found belonging to a young girl whose DNA revealed that she was a non-human but related to Neanderthals and today's Melanesians, especially those not far from Flores, the island where the apelike Homo floresiensis was found..
Mark Stoneking, professor at the Department of Evolutionary Genetics at the Max Planck Institute for Evolutionary Anthropology: "The fact that Denisovan DNA can be detected in some but not other original inhabitant populations living in Southeast Asia today shows that numerous populations with and without Denisovan DNA existed over 44,000 years ago. The simplest explanation for the presence of Denisovan genetic material in some but not all groups is that Denisova people themselves lived in Southeast Asia."
Klevius comment: Perfectly in line with Klevius' theory
Out of Africa as ape/Homo-hybrids and back as fully developed modern humans. Homo floresiensis, found at Flores, Indonesia, has already proved that a 450 cm2 brain was enough to make/use tools and fire on a level of Homo erectus with at least double that size.

A lion headed figure, first called the lion man (German: Löwenmensch, literally "lion person"), then the lion lady (German: Löwenfrau), is an ivory sculpture that is the oldest known zoomorphic (animal-shaped) sculpture in the world and one of the oldest known sculptures in general. The sculpture has also been interpreted as anthropomorphic, giving human characteristics to an animal, although it may have represented an unfactual presence deity. The figurine was determined to be about 32,000 years old[1][2] by carbon dating material from the same layer in which the sculpture was found. It is associated with the archaeological Aurignacian culture.[3] The sculpture is 29.6 cm (11.7 inches) in height, 5.6 cm wide. and 5.9 cm thick. It was carved out of mammoth ivory using a flint stone knife. There are seven parallel, transverse, carved gouges on the left arm. It is now in the museum in Ulm, Germany.

The Venus of Brassempouy was carved from mammoth ivory. She is 3.65 cm high, 2.2 cm deep and 1.9 cm wide. Her face is triangular and seems tranquil. While forehead, nose and brows are carved in relief, the mouth is absent. A vertical crack on the right side of the face is linked to the internal structure of the ivory. On the head is a checkerboard-like pattern formed by two series of shallow incisions at right angles to each other; it has been interpreted as a wig, a hood, or simply a representation of hair. the figurine in the Middle Gravettian, with "Noailles" burins circa 26,000 to 24,000 BP. Although the style of representation is essentially realistic, the proportions of the head do not correspond exactly to any known human population of the present or past.
Denisovian became a new lineage separate from all other Homo lineages to come, about one million years ago. However, despite the long differentiation period, they were still able to interbreed with modern humans 30,000 years ago. This is apparent because their DNA is found in New Guineans and many, but not all, populations in Asia. They evidently came from Africa at about the same time as the Neanderthals and spread across Asia, while the Neanderthals claimed Europe. Neanderthal DNA is found in Australian Aborigines, and in many Europeans, but not in New Guineans, and Australian Aborigines do not have Denisovan DNA.
It has recently been shown that ancestors of New Guineans and Bougainville Islanders have inherited a proportion of their ancestry from Denisovans, an archaic hominin group from Siberia. However, only a sparse sampling of populations from Southeast Asia and Oceania were analyzed. Here, we quantify Denisova admixture in 33 additional populations from Asia and Oceania. Aboriginal Australians, Near Oceanians, Polynesians, Fijians, east Indonesians, and Mamanwa (a “Negrito” group from the Philippines) have all inherited genetic material from Denisovans, but mainland East Asians, western Indonesians, Jehai (a Negrito group from Malaysia), and Onge (a Negrito group from the Andaman Islands) have not. These results indicate that Denisova gene flow occurred into the common ancestors of New Guineans, Australians, and Mamanwa but not into the ancestors of the Jehai and Onge and suggest that relatives of present-day East Asians were not in Southeast Asia when the Denisova gene flow occurred. Our finding that descendants of the earliest inhabitants of Southeast Asia do not all harbor Denisova admixture is inconsistent with a history in which the Denisova interbreeding occurred in mainland Asia and then spread over Southeast Asia, leading to all its earliest modern human inhabitants. Instead, the data can be most parsimoniously explained if the Denisova gene flow occurred in Southeast Asia itself. Thus, archaic Denisovans must have lived over an extraordinarily broad geographic and ecological range, from Siberia to tropical Asia.