However, there are also some data of various kinds and levels of credibility that suggest the existence of a few sporadic, most probably accidental, transoceanic voyages before Columbus, which apparently had very limited -if any- cultural and biological impact. The find of an apparently Roman head in Tecaxic-Calixtlahuaca, Mexico, seems to support the occurrence of one such voyage across the middle Atlantic, possibly somewhere in the first centuries of the Christian era.
