Several distinct series emerged, many of which were hosted by Stevens, including "V-LIST" (video game-related lists), "IMG" (featuring viral images), "DONG" ("Do Online Now, Guys", showcasing various online games and tools) and "LÜT" (showing nerdy and interesting products available online). He developed a catchphrase by introducing his videos with "Hey, Vsauce. Michael here". However, it was Stevens' educational content that attracted the most attention. He says he was inspired to create scientific videos by Paul Zaloom's work on Beakman's World. Stevens realized that his most popular content tended to incorporate more serious real-world concepts, often exhibiting interdisciplinarity. Notable examples include: "What is the resolution of the eye?"; "What is the speed of dark?"; "Why is your bottom in the middle?"; and "How much money is there in the world?" Later in 2010, Stevens launched two related channels, named "Vsauce2" and "Vsauce3", which eventually attained the sole hosts/producers Kevin Lieber and Jake Roper, respectively. By 2011–12, most content relating to internet and video game culture was delegated to these two channels, leaving the original "Vsauce" channel hosted and produced solely by Stevens, and devoted to educational discussion. Most videos are titled with a question, which Stevens answers or discusses at length, covering relevant tangents from any educational field that appeal to general interest. In 2012, the year after Next New Networks was acquired by Google, Stevens also began working as a content strategist for Google in London. His role focuses on Google's YouTube platform, including meeting with fellow content creators to optimize their videos' effectiveness. Stevens became an accomplished public speaker. He presented two TED talks in 2013: "How much does a video weigh?" at the official TEDActive, and "Why do we ask questions?" at TEDxVienna. He has also spoken at events for Adweek, VidCon, MIPTV Media Market, the Edinburgh International Television Festival, and for Novo Nordisk as a diabetes educator. In 2015, he appeared at the YouTube Fan Fest in Toronto. In October 2015, Stevens launched the DONG YouTube channel, to feature content from the "DONG" series formerly on Vsauce. Through his work with "Vsauce", Stevens has collaborated with and appeared alongside prominent individuals within the scientific community. These include Bill Nye (on "Why did the chicken cross the road?"), Derek Muller (on quantum randomness), Jack Horner and Chris Pratt (on dinosaur studies and "Jurassic World"), and David Attenborough (in an interview about "Planet Earth II").