Jetpacks and Certain Death: JOIN THE HANGOUT

Join us here for the Hangout: https://www.youtube.com/watch?v=Gefil...

And also if you're interested in Randall's work here's xkcd: http://www.xkcd.com

And here's his new book: https://whatif.xkcd.com/book/

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Join the community at http://nerdfighteria.com & http://effyeahnerdfighters.com
John's twitter - http://twitter.com/realjohngreen
John's tumblr - http://fishingboatproceeds.tumblr.com
Hank's twitter - http://twitter.com/hankgreen
Hank's tumblr - http://edwardspoonhands.tumblr.com