Did Neanderthals Cross Wallace's Line?

When modern humans reached Southeast Asia, they did not arrive alone on an empty stage. Long before them, a population of archaic humans had spread from the colder expanses of northern Asia into a southern landscape of tropical forest, river valleys, and limestone caves. These people were not purely Denisovan, nor were they Neanderthal. They were descendants of both, carrying the biological marks of a distant hybridization event that had occurred thousands of miles to the north.

SOURCES:
Resolving out of Africa event for Papua New Guinean population using neural network
https://www.nature.com/articles/s4146...

Multiple Deeply Divergent Denisovan Ancestries in Papuans
https://pubmed.ncbi.nlm.nih.gov/30981...