India, May 29 -- It remains a mystery whether the conehead mummies found in Peru are human or alien, some say. The latest DNA testing on the ancient skulls failed to find any evidence that they were not, in fact, human, according to science. But conspiracy theorists have been quick to point out that how would we know if the ancient Peruvians were literally a bunch of aliens?

The Paracas skulls were found in Peru in the 1920s and include about 300 mummies with very elongated skulls, a feature that has aroused the curiosity of researchers and others. Supporters of the paranormal claim that the odd skull shape is what would have been expected from a non-human species. But most archaeologists agree that the skulls in question are elongated a...