What's better than a NASA video explaining the difference between fusion and fission? A NASA video explaining the difference between fusion and fission—hosted by Portal villain GLaDOS, the delightfully acerbic homicidal AI voiced by Ellen McLain.
These days, GLaDOS is apparently moonlighting as a server at NASA, schooling ignorant IT techs under the not-so-oblique pseudonym "NASA's Official Talking General Leisure and Diversion Operational Server." The GLaDOS video is part of the IRregular Astronomy video podcast produced by NASA's Spitzer Space Telescope team. GLaDOS isn't IRregular Astronomy's first guest star – Felicia Day, George Takei, Mark Hamill, and Cameron Diaz have all made appearances in the series – but she's definitely one of the most menacingly fun. (Be sure to stay tuned until the end for the Rickroll.)
