PC: Pleistocene megafauna living with humans up until the present day

As far as I'm aware, one of the main theories about the extinction of much of the megafauna of the Pleistocene is that human overhunting caused many species to go extinct. Of course, there were certainly other factors (i.e. the changing climate), but I was curious about how plausible it would be for megafauna from the Pleistocene to continue to live until the present even with human presence and civilization. For the sake of discussion, let's use the megafauna of the New World; assuming everything else goes well, how long would they be able to survive into the period of human civilization?

I'm not sure if this needs to be moved to ASB, as while it deals with extinct animals, it's not strictly an evolutionary POD (as I highly doubt these species would evolve heavily in the span of a few thousand years) and it definitely isn't a geological one.
 
The simplest option would be just not having humans in the new world, at least not as early or in such numbers.

The POD would have to be either geological (no Bering land bridge, which would be a geological POD and thus would count as ASB if I understand the rules correctly) or something that keeps humanity from spreading east until the land bridge is gone. This early, the cause might be any natural disaster, such as a plague or great forest fire. Drastically cut down in the very early days the numbers of people moving northeast-east from, say, Kopet Dag/Hindu Kush and there might be early religions that state that this is divinely ordained. If the population loss is just large enough, there would also be less pressure to move and more pressure to stay in contact with other tribal groups. If people move north of the entire Alpide belt much later, there might even be a case for Eurasian megafauna at least lasting longer.

I have no doubt that the Koryaks (or whoever takes their place) will make it to Alaska long before humanity is capable of crossing the Atlantic, but they might do so in small enough numbers that some of the megafauna is still extant for when Europeans get there.
 
human overhunting caused many species to go extinct.

The latest theory for Australia is the rapid (in geological terms) changing of the landscape by firestick farming. This changed the vegetation throughout Australia which affected the megafauna more than other animals. This was the long pole in the tent of climate change, blitzkrieg hunting and other factors.

It would be hard to change the practice of firestick farming.
 
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