But one teenager skipped that and jumped into teaching, setting a world record in the process. Article continues after adThat wasn’t the case for Nathan Thomas, who became the youngest professor ever at just 18 years old, taking over a record that had stood for more than three centuries. Despite his age, Nathan is a fully qualified teacher with an extraordinary academic background. Article continues after adNathan was also 16 days younger than Alia Sabur when she set the record for the world’s youngest female professor in 2008 at 18 years and 362 days old. Speaking to Guinness World Records about teaching students who are often close to his own age, Nathan explained that it has never been something he focuses on.