Davina McCall interviews physicist and broadcaster Brian Cox about cosmology, the origins of matter and the value of scientific thinking. Cox describes how the early universe’s hydrogen and helium, shaped by gravity and stellar evolution, produced heavier elements and ultimately planets and life, arguing that this narrative can supply perspective on human fragility and responsibility. He discusses the search for life beyond Earth, saying there is no confirmed evidence of other civilisations and suggesting it is plausible that technologically capable societies are rare.
Cox recounts his own path from touring as a musician to returning to physics, and explains his work at CERN’s Large Hadron Collider, where collisions are used to probe conditions shortly after the Big Bang. He also touches on how astronomical measurements are made, including the historical role of astronomer Henrietta Leavitt in establishing “standard candles” for cosmic distances.
On technology and policy relevance, Cox cites a House of Lords figure that 18% of UK GDP relies on space-based infrastructure, linking satellites to navigation, timing for financial systems and environmental monitoring. He also warns that quantum computing may eventually make today’s common encryption breakable, potentially rendering previously stored encrypted data readable, while noting potential benefits in materials science and biology.
The conversation returns repeatedly to uncertainty as a virtue in science and public life, with Cox arguing that progress depends on admitting what is not yet known.
Physicist and broadcaster Brian Cox says a recent House of Lords report put the share of UK GDP dependent on space-based infrastructure at 18%. He links the figure to everyday reliance on satellites for navigation, timing and other services that underpin financial transactions and environmental monitoring.
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