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
Available Podcasts from CrowdScience
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