Tom Scott has over 3.1 million subscribers coming to his channel for videos about science, technology, and interesting curiosities.
His videos have taken him across Europe, North America and even to the Arctic, and amassed more than 705 million views in the process.
His second YouTube channel, 'Matt and Tom' boasts over 214 thousand subscribers with videos including the hugely popular 'Park Bench’ series, behind-the-scenes videos and interviews.
Before YouTube and his famous red t-shirt, Tom studied linguistics at the University of York, ran for Parliament - and in 2008 was the UK organiser of International Talk Like a Pirate Day. He has coded games and webtoys for Comedy Central UK, Publicis and Nokia, and presented Gadget Geeks for Sky One in 2012.
His eponymous YouTube channel features videos investigating everything from why the world is slowly running out of sand to America's first supermodel.