Brien Foerster of the Paracas Museum says initial DNA analysis of an bizarrely elongated skull shows that it is not human in origin.
He says a geneticist, who remains anonymous until further testing firms up the initial result, says the skull had mitochondrial DNA unknown in any human, or for that matter in any known creature on Earth for which samples have been sequenced and entered into the international database.
Others say eventually testing will prove they're actually human, or possibly a hoax.
However geneticists, anthropologists, paleontologists and other learned people eventually classify the Paracas Skulls, the debate will likely continue.
Foerster says the geneticist does contract work for the U.S. Goverment, and will go public after further testing conclusively proves that the skulls are not human.
More than 300 0f the skulls were found in 1928 in a mass grave near the southern coast of Peru.
For decades, it has been assumed that they were examples of deliberate cranial deformation as practiced by some cultures.
They would bind or flatten the heads of infants; a Native American tribe referred to as the Flathead Nation in western Montana is one example.
But doctors say that while the skull can be deformed, the size of the skulls remains consistent.
Not so with the Paracas skulls, which are quite a bit larger.