The Guardian's Science Weekly

What happened before the Big Bang? This is one of the hardest questions scientists are trying to answer, but Prof Hiranya Peiris is not daunted by the challenge. Hannah Devlin invited Peiris on the podcast to discuss the origins of our universe. Help support our independent journalism at

How do protein substitutes compare with the real deal? Graihagh Jackson investigates by speaking to dietician Priya Tew, the Guardian’s Fiona Harvey and author Isabella Tree. This podcast was amended on 18 May 2019. An earlier version incorrectly claimed that Vitamin B12 is also known as Folate or Folic Acid. Whilst Folate/Folic Acid is also a B Vitamin, it is not Vitamin B12.. Help support our independent journalism at

Access to help for sexual problems is patchy and many fear the consequences of cuts to sexual health services could be profound. Nicola Davis investigates Please note: this podcast contains discussion of sexual abuse. Help support our independent journalism at

Wildlife sound recordist Chris Watson concludes a three-part journey into the sonic environment of the ocean examining the possible threats caused to marine life by noise pollution. In this final episode he looks at solutions and discovers an unlikely role for sound artists such as himself. Help support our independent journalism at

Wildlife recordist Chris Watson is joined by award-winning sound artist Jana Winderen on a voyage around Norway’s Austevoll islands, aboard a research vessel recording the grunting of spawning cod. Help support our independent journalism at