One thing a lot of people forget about, including us here, is in regards to modern human migrations out of africa to the mid east and india/south east asia
of course these -with pretty good certainty, occurred about 40,000 yrs ago during the last ice age (2.6 million yrs to approx 11000 yrs ago
people ask about how did they cross water obstacles like the red sea, persian gulf and the straits in modern day malaysia?
well they didn't need boats, the coastlines were much different and the route would have been dry. even into new guinea and australia..dry routes existed
and later? well why would they not have established settlements along the way on these old coastlines? we know they did to varying extents. "sunken" villages and small cities have been found under the caspian and black sea coastlines, as well as the Mediterranean, Red seas and in the persian gulf
We always underestimate those who came before us, whether 100 or 50,000 yrs ago.