Genetic tests reveal tragic reality of Atacama 'alien' skeleton While only six inches tall, the bones had some features of a child aged six to eight. Instead of the usual 12 pairs of ribs found on humans, Ata had only 10 pairs.(設計缺陷) The head was an elongated cone shape. https://www.theguardian.com/science/2018/mar/22/genetic-tests-reveal-tragic-reality-of-atacama-alien-skeleton