11. Robin-Evans claimed that the Dropa tribe was of extraterrestrial origin and had crashed on Earth. 12. In the " Pathfinder Roleplaying Game ", the froghemoth's possible extraterrestrial origins are expanded upon. 13. The absence of DNA was key to Louis and Kumar's hypothesis that the cells were of extraterrestrial origins . 14. Within those Buckyball cavities, Becker said, the researchers found a helium isotope thought to be of extraterrestrial origin . 15. Organic compounds, thought to be the starting material for prebiotic chemistry, could have partly had an extraterrestrial origin . 16. Hill was a strong proponent of the extraterrestrial hypothesis, which suggests that some UFOs represent structural craft of extraterrestrial origin . 17. In the finished film, the villains are explained to be gangsters, and no reference is made to any extraterrestrial origin . 18. Mulder tells Skinner that both Merkmallen and Sandoz espoused panspermia, a theory suggesting an extraterrestrial origin to life on Earth. 19. The extraterrestrial origin was seen by Regalado as challenging the notion that Anglo-Saxon ancestry was the source of all might. 20. The Kents kept a small fragment of debris from the ship and learned of its, and the child's, extraterrestrial origins .
