He has intriguing theories, and I do enjoy the series, but it should be noted that a lot of his theories have weak or non-existing support outside of his fan circle.
‘What I am suggesting is that the Polynesians encountered a pre-existing population on that island, evidenced by those banana [remains]... present there at least 3,000 years ago,' he told DailyMail.com.
'And that from that pre-existing population, they inherited the older traditions and songs that we see today.'
Hancock also proposes that the statues on Easter Island are likely much older than the platforms—called Ahu Vinapu—on which many of them sit, pointing out that the two feature different construction techniques.