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The Secret Genius of Modern LifeSeries 3Episodes

    Fridge

    2/5Hannah hits the production line to find the lifeblood at the heart of every fridge.

    Air Fryer

    1/5Hannah looks at the air fryer – a device that is rapidly taking over people's kitchens.

    Rollercoaster

    3/5Hannah Fry uncovers the wild origins of the modern-day rollercoaster.

    Doorbell

    4/5Hannah heads to Los Angeles to take a deep dive into doorbell history.

    Motorway

    5/5Hannah drives to the National Highways control centre for the UK’s busiest motorway.