The BBC World Service has outlined plans to increase the number of languages in which it broadcasts from 29 to 40 – in a drive to reach half a billion people across the world by 2022. It is the biggest expansion of the broadcaster in more than 70 years, and a signal that Britain aims to exercise its soft power more vigorously.

The International Space Station circles the Earth about every 90 minutes, and in that time they move in and out of range of a number of terrestrial radio stations. If you’re ever curious what’s broadcasting in the part of the world the ISS is moving over, Radio ISS will play it for you.