What's the magnifying strength of my marble?

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

Will Tingle takes on this head scratcher from listener David with the help of Professor Adam Taylor of the University of Lancaster... Like this podcast? Please help us by supporting the Naked Scientists

Thanks to UCL's Mark Maslin for the answer! Like this podcast? Please help us by supporting the Naked Scientists

For this Question of the Week, Lotus wants to know whether wearing mirrors could help us keep cool in the sun. James Tytko took on the challenge of answering... Like this podcast? Please help us by supporting the Naked Scientists

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

Will Tingle took on this linguistic query from listener Satya with the help of David Crystal... Like this podcast? Please help us by supporting the Naked Scientists

Taking on this week's question, James Tytko kneaded help from baking expert Nicola Lamb... Like this podcast? Please help us by supporting the Naked Scientists

Thanks to ARU's Nikita Thomas for the answer! Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Dr Emma Pomeroy for the answer! Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Dr David Whitehouse for the answer! Like this podcast? Please help us by supporting the Naked Scientists