Episode description

What do scientists think is outside our universe? Asks Rebecca Standridge from San Francisco in the US.

It’s a question which goes right to the limits of human understanding.

We look for the answer using balloons, bubbles and the world’s oldest radio telescope.

If you have a question about science that you'd like us to investigate email crowdscience@bbc.co.uk.

Photo: Lovell telescope Jodrell Bank