What is responsible for a coffee's foam?

While helping his son with his maths revision, Andrew was struck by the ease with which he slipped back into the groove of the subject. He wants to know why that might be. James Tytko sought to find out with help from Catherine Loveday, neuropsychologist at the University of Westminster... Like this podcast? Please help us by supporting the Naked Scientists

James Tytko answers listener John's question with the help of Professor of Cardiovascular Health, Nadia Rosenthal... Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Rhod Jervis for the answer! Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Steven Abbott for the answer! Like this podcast? Please help us by supporting the Naked Scientists

James Tytko asked Toby Wiseman, professor of theoretical physics at Imperial College London, to answer this question from listener Daniel... Like this podcast? Please help us by supporting the Naked Scientists

Jimmie sends in this week's question, seeking an answer as to why plastic loses its flexibility. James Tytko took on the question with the help of Chemistry World's Phillip Broadwith... Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Professor Heather Graham for the answer!This episode of Question of the Week, listener Donald asks:"Assuming mosquitoes have taste buds, then they should have adverse tastes. Have molecular scientists explored how to make or find chemicals that make mosquitoes disgusted?"Will - As someone who's about to head off to a particularly mosquito-heavy part of the world, I too would find great reassurance in knowing that I was using the most effective means of preventing a mozzie bite. Paul on the forum is thinking long term and says 'there is hope that current experimental malaria vaccines... Like this podcast? Please help us by supporting the Naked Scientists

This week's Question of the Week comes in from listener David, who asks:'On the show 'Tipping Point', Often at the end they play out the final three counters as 'What would have happened.' Would the result actually be what would have happened?Thanks to Tony Padilla for the answer! Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Bencie Woll and Victoria Mousley for the answer! Like this podcast? Please help us by supporting the Naked Scientists

Thanks to University of Cambridge's Ben Allanach for the answer! Like this podcast? Please help us by supporting the Naked Scientists