What fills the space between stars in our universe? Pure nothingness?

After sparking interest with our curious audience at Standon Calling, Tessa Baker visited us in Exeter. She discusses how space, in fact, isn’t empty and still, but can twist and stretch like a piece of elastic. And when it does, it produces special ‘sounds’ called gravitational waves, which we can hear with some incredible instruments.

Tessa Baker is Professor of Cosmology and Royal Society University Research Fellow at the University of Portsmouth. She take us on a journey through outer space, black holes, and the most violent events in the universe, to explain one of the most exciting scientific discoveries of the century, and what it means for our understanding of the cosmos.

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