From the article:
...identifies a 3,500-year-old gold image - found in a museum in Athens - as that of the lost Ark of the Covenant.
He isn't claiming to have found the Ark, but an image of it. It would be rather difficult to have a piece of art with an image of the Ark carved on it that predates the Ark itself.
Thanks, should have read that more carefully.
If I remember correctly the image is of the Ark from the front and collapsed along that perspective.