These kinds of skulls have been found for years in the Americas, where cranial deformation is believed to have been a widespread practice.
In 2012, a burial ground of 25 skeletons was found in Mexico, 13 of which showed skull deformation.
Brien Foerster claimed that "preliminary results" indicated the Paracas skulls were alien in a video interview with The People's Voice, an internet television station.
But Foerster is yet to publish the results of the DNA testing in a scientific journal.
Until he does, this is just pure speculation. But given the widespread nature of intentional skull deformation in the area, we're betting on a more terrestrial explanation.