A simple proof that lim θ→0 sinθ/θ = 1pic.twitter.com/7rOnLgnnCD
The government will scrap a fuel tax to allow negotiations with lorry drivers for the next 15 days.
The vice-foreign minister calls the US decision to cancel the 12 June summit "extremely regrettable".
BBC Click's Marc Cieslak looks at some of the best technology news stories of the week.
Strawberry producers say they can't find enough humans to pick their fruit, so are robots the answer?