Episode 3 - 3D printing and Brian Cox-ing

3D printing has evolved to the stage where we can now create aircraft parts, satellite components, medical implants and even copies of people’s faces. However, as Kieran finds out, this promising field also has potentially troubling aspects. Also, in the era of "fake news", we hear how science communication is more important than ever with the presenter of the BBC World Service programme "Digital Planet", Gareth Mitchel.