In BBC Inside Science, Adam Rutherford and guests illuminate the mysteries and challenge the controversies behind the science that's changing our world.
Tune in to BBC Radio 4 on Thursday 25 September at 16:30 to listen to this week's programme. More information and a link to listen again is available from the BBC's Inside Science pages.
On this week's programme:
Gravitational waves and dust – One of the biggest scientific claims of 2014 has received another set-back. In March this year, the US BICEP team said it had found a pattern in the sky left by the rapid expansion of space just fractions of a second after the Big Bang. This announcement was quickly criticised by others who thought the group had underestimated the confounding effects of dust in our own galaxy. And now, new analysis from the European Space Agency’s Planck satellite makes dust a more likely culprit. It turns out BICEP are looking at a good patch of sky but not the best. A collaboration is hoped to follow. BBC science correspondent Jonathan Amos has followed the story from the start, and gives us the low down.