In this week's tech show, Steve Caplin discusses the Swiss researchers who've calculated Pi to 82.8 trilllion digits; but how will the Guinness Book of Records check it? He also brings news of the first ever wooden satellite, the battery-laden caravan that won't slow your Tesla, Tesla's problems with flashing emergency lights, dissolvable smart watches, getting bacteria to find precious metals in the Brussels sewers, how to train self-driving cars for British, rather than Californian, weather, three-quarter size Ferrari Testarossas for children and more tongue-in-cheek Amazon reviews.
