Today, these apes live only in Borneo and Sumatra.
Probably, there used to be a Sumatra-Java land bridge then; as orangutans don’t swim.
These are results of new research in the Gunung Dawung area of Java, by palaeoanthropologist Paul Storm and others.
The team also found modern humans (Homo sapiens) lived in Java then.
This is earlier than thought so far.
Talking about evolution: US corporations do not want to sponsor scientific evolution exhibitions; see here.
Orangutans and intelligence: here.