A lot of BS. In order to have an Ark, you need to have had a Flood. No such Flood happened 4000 years ago. There would be evidence consistent with universal flooding that would be recognizeable from known characteristics of floods that actually did happen.
Are there cultures who continued uninterrupted from well before, until well after 4000 YBP?
(4356 YBP if the Archbishop Ussher date is accepted.)