The purpose of this investigation was to determine the validity of the claim that the Starchild Skull, a 900-year-old anomalously shaped skull, belonged to an alien-hybrid being.  The first phase of the project was to procure an exact replica and secure legal rights to continue with physical testing of the original. Then, the skull was compared with other human and animal skulls and most closely resembled that of a 5 year down syndrome child. When exact measurements were taken to compare to that of a typical skull of around 5 years old, the most notable discrepancy was its increased cranial capacity. A study of the teeth confirmed the skull belonged to a child about 5 years of age. The final phase involved extracting DNA from the inside of the skull and a tooth. The mitochondrial DNA tests showed that the child was a male and his mother was a Native American from the haplogroup C1. The paternal DNA test revealed the father was Native American haplogroup Q. The Starchild Skull was confirmed to be 100% human.