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One short message led to a Twitter ban for a controversial activist – and highlighted the complicated world of transgender politics and how philosophical battles within transgender communities are playing out on social media. How many words do you need to speak a language and how many words do native speakers actually use? Reporter Beth Sagar-Fenton finds out with help from Professor Stuart Webb, and puts Tim Harford through his paces to find out how big his own English vocabulary is. People have been fishing for thousands of years – it is one of the last hunter gatherer activities. But increasingly it is becoming more difficult, as fish stocks dwindle or regulation limits the number of fish that can be caught. Caz Graham asks why do people continue to fish despite these challenges. (Photo: Illustration of people going from woman to man Credit: Getty Images)