The people who left Sunda and crossed the Weber line to settle Sahul 50 - 60,000 years ago had to traverse about 90km of deep ocean to do so.
"Passively floating on a raft" for 90km was never really plausible.
"Passively floating on a raft" for 90km was never really plausible.
The ocean reaches depths of 7000m in trenches between the Sahul and Sunda shelves, and, at least during the last glacial maximum, 21K years ago, the sea level was only 140m shallower.