If the Universe is expanding, what is it expanding into?

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

This week, Carl writes in to ask whether he can be cured of specific musical anhedonia. This is a condition whereby a person can hear and distinguish between different types of music and the emotion they convey, but doesn't feel moved in the same way most people do. James Tytko took on Carl's conundrum with the help of Malinda McPherson, Assistant Professor at Purdue University's Department of Speech, Language and Hearing Sciences... Like this podcast? Please help us by supporting the Naked Scientists

When listener Suzy is taking pictures of the night sky, she makes use of longer shutter speeds to capture more light to get better images of stars. That got her thinking, do human eyes also have a shutter speed? James Tytko took up the question... Like this podcast? Please help us by supporting the Naked Scientists

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

In this week's Question of the Week, listener James writes in to ask, is it just him, or does spider silk feel really strange? James Tytko took on the question with Professor of Evolutionary Biology and Genetics at the University of Nottingham, Sara Goodacre, and entomologist at Western Sydney University, Eleanor Drinkwater... Like this podcast? Please help us by supporting the Naked Scientists

This week, Jon wants to know, in the wake of wildfires across the world in recent years, should we be concerned about their carbon footprint? James Tytko asked Jim Dale from British Weather Services for the answer... Like this podcast? Please help us by supporting the Naked Scientists

Christine emails in with this message: 'Does bacteria contained in probiotics become part of the microbiome; in other words can one stop taking probiotics after 30 days of taking probiotic-containing capsules?'James Tytko sought to find the answer with the help of Alex Almeida, microbiologist at the University of Cambridge. Like this podcast? Please help us by supporting the Naked Scientists

Anne writes in with this question, which James Tytko took on with the help of the University of Cambridge's Public Astronomer, Matt Bothwell... Like this podcast? Please help us by supporting the Naked Scientists

Elizabeth with a transatlantic teaser for this question of the week: "I heard that people in the UK can't smell when it rains, but us Americans can. If I went to the United Kingdom, would I be able to smell the rain there? Would someone from the UK be able to smell rain here? What is going on?" James Tytko sought the answer with the help of Anne Jungblut from the Natural History Museum... Like this podcast? Please help us by supporting the Naked Scientists

Join James Tytko in the hunt for ancient DNA thanks to this question from listener Phil. Jack Lovegrove from the Natural History Museum was on hand to help with the answer... Like this podcast? Please help us by supporting the Naked Scientists