The answer explains how Sunda and Sahul were formed and how early humans may have migrated between them.
Sunda was a landmass consisting of modern-day Malay Peninsula, Sumatra, Java, and Borneo, connected by lowered sea levels and land bridges. Sahul comprised New Guinea and Australia, forming a single continent. Early humans migrated through these regions by utilizing natural land connections during periods of lower sea levels in ancient times.
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