This was one of the first commercially available mobile phones—it cost about £9000 in today's money, and had a battery life of 30 minutes talk time. In his 1985 Christmas Lectures, David Pye demonstrated this brand-new technology of the time. Watch the full series here: rigb.org/christmas-lectures/watch-royal-institution-christmas-lectures-archive This year marks the 200th anniversary of the Christmas Lectures. Stay with us as we share our favourite bits from the archives. #Discover200 | Royal I

10K views · 255 reactions | Are you ready for round two of the Christmas Lectures tonight? Sue Black will work with a host of world-class experts in forensic science, as they reveal how they find clues that are invisible to the naked eye, and analyse them to solve crimes. Tune in to BBC Four/iPlayer at 8pm! | Royal Institution of Great Britain | Facebook

10K views · 243 reactions | In the Christmas Lectures we learnt how forensic investigators find and analyse evidence. Tonight, we'll see how it holds up in court, as the Ri turns into a courtroom and Sue Black faces a real-life KC. The audience will decide the fate of our trial 六‍⚖️ 8pm on BBC Four/iPlayer. | Royal Institution of Great Britain | Facebook