Prof Richard Wiseman from the University of Hertfordshire is an expert on laughing, giggling and guffawing. He even has his own iPhone app. He's giving a talk at the Royal Institution on Wednesday 31 March.
We also reveal the world's funniest joke as told by people on the streets of London.
The European premier of the new Imax film, Hubble 3D, has taken place at London's Science Museum. David Brower tells us about the complexity of rendering some of the fly-throughs, including the 'star' of the show, the Orion nebula.
A new exhibition at the Royal College of Art attempts to predict some of the ways current research will help create future technologies. Producer Andy visited Impact.
Nell Boase is your host while Alok is away.
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