https://www.howandwhys.com/dna-tests-reveal-3000-year-old-paracas-skulls-are-of-unknown-human-race/
According to some DNA analysis, the deformation in the skull was not created artificially but due to the genetics. The elongated skulls of the Paracas culture have other strange features.
Researchers concluded that the average volume of these skulls is 25% larger than that of the average modern person. Besides, they are 60% heavier than ordinary human skulls. But that is not all.