Digit-diallers in Japan will be jumping for joy as the country plans 10 billion new phone numbers – that's 80 per person, which is probably enough. Researchers have used an X-ray laser to create the loudest possible underwater sound, at 270 decibels. Any louder, and the water would boil. In a battle of the blocks, Minecraft has become the best-selling video game of all time, beating Tetris with 176 million copies sold. The cryptocurrency hit a recent high of $8000, but, honestly, who knows what the price will be by the time you're reading this.