James Tytko took on this question with the help of the University of Glasgow's Richard Bowman... Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Professor Michalis Zervas and Professor Simon Hooker for the answers! Like this podcast? Please help us by supporting the Naked Scientists

James Tytko took this question on... Like this podcast? Please help us by supporting the Naked Scientists

Joanne sent in this question, which James Tytko posed to Laurence Hurst from the University of Bath... Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Dr Ellen Arnold for her help with this question! Like this podcast? Please help us by supporting the Naked Scientists

This week's question involves the evolutionary process of speciation. James Tytko asked the University of Sheffield's Roger Butlin... Like this podcast? Please help us by supporting the Naked Scientists

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

Thanks to Cecilio for sending in this question. James Tytko asked University of Leeds Professor of Dermatology, Julia Newton Bishop, for assistance... Like this podcast? Please help us by supporting the Naked Scientists

Will Tingle took on this chilling conundrum, with the help of Imperial College London's Henry Burridge Like this podcast? Please help us by supporting the Naked Scientists

James Tytko spoke with David Spiegelhalter to help solve listener John's musical mystery... Like this podcast? Please help us by supporting the Naked Scientists

James Tytko took this cosmic conundrum on with the help of Toby Wiseman, theoretical physicist from Imperial College London... Like this podcast? Please help us by supporting the Naked Scientists

Chris Smith took on this week's question from listener Kala... Like this podcast? Please help us by supporting the Naked Scientists

Taking on this question from listener Christie, James Tytko enlisted the assistance of Chemistry World's Philip Broadwith... Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Marc de Lussanet for the help with the answer! Like this podcast? Please help us by supporting the Naked Scientists

James Tytko enlisted the help of the University of Cambridge's Xander Byrne to help with this question from Frank, who asks: "Have there been any studies on the effects of rocket launches on the greenhouse effect respiratory issues or general carcinogenic properties?" Like this podcast? Please help us by supporting the Naked Scientists

Thanks to Dr Ellen Coombs for the answer. Like this podcast? Please help us by supporting the Naked Scientists

Regular listener, Mike, asked: "When tennis players are about to serve, they get a selection of balls. They seem to look at them and then select two to serve with. Now these are all new and good quality balls, how do they select the ones they like to use? Do they recognise them? Do they have favourites?" Very topical, Mike. Rhys James travelled to meet the tennis coach, James Hoad  in Bury St Edmunds: Like this podcast? Please help us by supporting the Naked Scientists Like this podcast?...

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Why is it that some mammals with small broods have the baby feeding apparatus near the upper limbs like humans and elephants and some near the lower limbs like cows and horses? As it turns out, this is a very good question. What dictates where the teats are on a mammal? The short answer is, well, no one is really sure, but that's not going to stop us from a bit of deductive reasoning and speculation. And one man who is up to the task is Queen Mary University of London's Chris Faulkes.Chris -...

Could someone travelling into the future potentially take a pandemic disease with them, or bring back something similar upon their return? James Tytko enlists the help of Cambridge University immunologist Brian Ferguson... Like this podcast? Please help us by supporting the Naked Scientists

Akula writes in to ask, 'Can we compress gas into a solid?' James Tytko seeks to provide the answer... Like this podcast? Please help us by supporting the Naked Scientists

This week, are biofertilisers an answer to solving the use of chemical fertilisers? Are they more advantageous in any way? Like this podcast? Please help us by supporting the Naked Scientists

What is the speed of evolution and, apart from reproduction, what are the factors that affect this? Like this podcast? Please help us by supporting the Naked Scientists

Listener Jo asked: "Why is it so I can sit with a sudoku until I have no idea what to do next, so I leave it. When I go back to it later I always find new possibilities straight away." James Tytko spoke to Alejandro Lleras Like this podcast? Please help us by supporting the Naked Scientists

Listener David wrote this cosmic conumdrum into the Naked Scientists "How are black holes formed? And why are they often at the center of galaxies?" Otis Kingsman spoke to astrophysicist and author of the book "A Brief History of Black Holes", Dr Becky Smethurst... Like this podcast? Please help us by supporting the Naked Scientists