Can you drink a black hole? Is sand evil? All these questions and more are put to our smartest guest yet, Professor Brian Cox.

Professor Brian Cox is on tour with ‘Horizons’. Dates and tickets at briancoxlive.co.uk.

Follow Brian on Twitter and Instagram @ProfBrianCox

Recorded and edited by Ben Williams for Plosive.

Artwork by Paul Gilbey (photography and design) and Amy Browne (illustrations).

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