Following a referendum, the UK has voted to leave the European Union. What might that mean for the UK’s economy, especially for trade? Tim Harford examines the economic forecasts from the government, and how the UK might manage its relationships with other countries for More Or Less.

Why have murder rates spiked in several US cities? The head of the FBI, James Comey, has asked whether police are holding back from their work through fear of being filmed on camera phones and going viral on YouTube. The theory has been dubbed the ‘Viral Video Effect’, or the ‘Ferguson Effect’ after the city that witnessed unrest after a black teenager was killed by a white police officer. BBC Trending reports.

Why are we attracted to some people and to not others? Beauty, facial symmetry, personality and values all play a role in our attraction to others. Evolution biologist Dr Anna Machin from Oxford University explains the science behind our feelings. Mike Williams presents the Why Factor.

(Photo: A pay-per-view binocular with the British and European Union flags. Credit: Sean Gallup/Getty Images)