The dry wit of the evil artificial intelligence GLaDOS, voiced with perfect acerbic delivery by actress Ellen McLain, is one of the high points of the Portal video game series. Now GLaDOS has found new purpose as a teaching tool via NASA to discuss the differences between nuclear fusion and fission energy, with McLain returning to provide the distinctive voice. Make no mistake about it, even though this is about learning, GLaDOS is still very much evil!

Check out the full video below.

Guillermo del Toro is one of the most talented and visionary directors and storytellers working today. He also happens to be a massive geek, just like you or I. This is exactly why most geeks have “hug Guillermo del Toro” somewhere on their bucket lists.

One of the forms of entertainment that del Toro is a big fan of, as many of us are, is video games. And one of his favorite games is the ultra-popular Valve Software puzzler Portal.

This became blatantly obvious when we finally got our eyes on the first trailer for del Toro’s overwhelmingly massive giant robots vs. giant monsters movie, Pacific Rim, in which the voice of the equally popular Portal villain GlaDOS can be heard.