The YouTuber says his mum and dad initially wanted him to become a doctor or lawyer.Read more
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Hundreds of thousands of people from all over the world are watching these men solve Sudoku puzzles.
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Diogo Martins says he finds the history behind the machines "endearing".
Two astronauts launched into orbit for historic mission to the International Space Station.
Tristan Cross taught himself how to make the 3D models from scratch by watching YouTube videos.