Early Hominoids lived in flooded forests?

I read an interesting paper on academia.edu this morning that posits the possibility that our ancestors spent a lot of time in both trees and the water, making them aquarboreal.  It’s an interesting idea and there is some evidence although the case is far from closed.

If the hypothesis is true, it would mean our ancestral homeland (or one of them, ultimately it is the sea however you spin it) was a forest maybe much like parts of the modern Amazon.  Imagine living in a forest where periodically the whole thing is flooded and swimming suddenly replaces walking or maybe even jumping from tree to tree.  It’s an intriguing idea and I encourage anyone who’s interested to read the whole paper here.