The Hammer of Hawking: The Impact of Celebrity Scientists, the Intent of Extraterrestrials and the Public Perception of Astrobiology Posted on June 26, 2014 by UHNAI Webmaster in Gazan, R. (). The Hammer of Hawking: The Impact of Celebrity Scientists, the Intent of Extraterrestrials and the Public Perception of Astrobiology. , 18, 6,