On Thursday, May 7, 2008, Johnson appeared on the Stephen Colbert show to promote his new book, entitled "The Ten Most Beautiful Experiments". During his appearance, Johnson convinced Colbert to touch the spark produced by one of the electricity experiments. Colbert shocked his hand yelling obscenities that were bleeped out but appeared to be fine after the incident. George Johnson | The Colbert Report | Comedy Central
Currently, Johnson is one of the co-hosts (with science writer John Horgan) of "Science Saturday", a weekly discussion related to science topics on the website Bloggingheads.tv. Many prominent scientists, philosophers, and bloggers have been interviewed on Bloggingheads.tv. When Horgan and Johnson converse, they generally discuss a wide variety of current science related topics.