If it turns out the Nasca were, in fact, cohabitating with a three-fingered and toed (but with 4 joints on each finger and toe) intelligent humanoid, but not human, species a little over 1700 years ago, I will, with every sign of joy, eat my hat.
(Headline edited down due to length: Biometric Morpho-Anatomical Characterization and Dating of The Antiquity of A Tridactyl Humanoid Specimen: Regarding The Case of Nasca-Peru)