![Discovery show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/030/810/small/discovery.jpg)
Summary: In March astronomers in the BICEP2 collaboration announced they had found gravitational waves from the Big Bang. But now the evidence is being questioned. Dr Lucie Green reports.
Summary: In March astronomers in the BICEP2 collaboration announced they had found gravitational waves from the Big Bang. But now the evidence is being questioned. Dr Lucie Green reports.