As of 2013, he was working at the Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic as a member of a research group headed by Pavel Jungwirth.

"[10] Mason has used his online persona to critically examine a range of topics, including proposals to build roads surfaced with glass solar panels.

[13][14][15][16] In 2015, Jenny Keller, who ran the YouTube channel "Laughing Witch", attempted to get Mason fired by sending letters to his employer.

After promoting the campaign online, Mason responded by posting a series of videos scrutinizing Keller and the Bowie, Maryland-based company she runs with her husband, Porcelain Tub Restoration.

Sociologist Richard Cimino has described the tone of these videos as "that of the professional, well-educated, and articulate British academic expert exposing—in voiceover—the irrational behavior and attitudes of the believer.

"[20] Mason (originally known only as Thunderf00t) debated with VenomFangX, a YouTube blogger who supports creationism, in a series of public exchanges that lasted almost two years.