Adrienne Murray meets the engineers designing icebreaker ship technology for the Arctic.
Teenagers affected by Australia’s under-16 social media ban showed the BBC what happened when they tried to access their accounts.
The order to make the registration mandatory had led to a major backlash from several cyber experts.
The central bank says US stock price valuations are their most stretched since the dotcom bubble burst.
The app, which was criticised at launch for its $11.99 (£9) a month fee, will close on 31 December.