4.2M views · 7.1K reactions | "How did your hammer grow, Chris?"  Playground Insults could have caused a real rift in Chris Hemsworth and Scarlett Johansson’s friendship, but they're just too polite.  #Avengers #AvengersEndgame | BBC Radio 1 | Facebook

21K views · 248 reactions | How two engineers, Jacques Piccard and Lieutenant Don Walsh, became the first people to journey to the world's greatest depth, the bottom of the Mariana Trench in the Pacific Ocean in 1960. Watch more films from BBC Witness History: https://bbc.in/3oQt4to | BBC World Service | Facebook

588K views · 9.1K reactions | This group of sixth-formers are campaigning to have our national curriculum on British colonial history refreshed. | BBC Three | Facebook