This week, as Education Secretary Michael Gove calls for better computer science in schools, Quentin looks at how cheap or open source software and hardware could help. Seeing the invisible: the most detailed map of dark matter in the universe has been unveiled at this weeks' meeting of the American Astronomical Society. Royal Horticultural Society reveals its list of the worst garden pests of 2011. And Adam Rutherford samples horrible sounds with So You Want To Be A Scientist finalist Izzy Thomlinson.
Producer: Martin Redfern, Victoria Kent.