Zoe Kleinman meets the scientists in Switzerland trying to make living computers using brain cells. Adrienne Murray is in Denmark to see the world’s first commercial-scale plant making green methanol - a cleaner fuel which could help cut the emissions of big ships. Shiona McCallum hears from the boss of social media platform Pinterest. Also, Paul Carter heads behind the scenes of the pioneering Bell Labs in New Jersey, home to some of the biggest tech breakthroughs in history.
