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National Geographic Society
National GeographicNat Geo WildNat Geo People


Industrial scientists Richard Ambrose and Jonny Phillips find extraordinary facts behind ordinary everyday objects.

I Didn't Know That, an action-packed series, exposes little-known facts about ordinary items we take for granted. From airbags to teabags, toothpaste to tea, and condoms to crash helmets, each episode is a mind-blowing cavalcade of crazy demonstrations and rarely-heard info about everyday stuff.

Follow presenters Richard Ambrose and Jonny Phillips – two bona fide industrial scientists with an insatiable thirst for knowledge – on their quest to investigate how things are made, what's inside them, how they are tested and how they work.


  • I Didn't Know That
    Richard and Jonny delve into the world of rubber to test tyres. Find out about this and more on I Didn't Know That.
  • I Didn't Know That: Ep 1
    Richard and Jonny reveal the house secrets,plus how barcodes work and we discover whether in-store music really affects what you buy in supermarkets.
  • I Didn't Know That: Ep 2
    Richard attempt to become a Kung Fu master, will he succeed in chopping bricks in half? Can bubble wrap protect a china plate from a 8 ton tractor?
  • I Didn't Know That: Ep 3
    Can you beat a lie detector? Jonny thinks he can do it using an old spy trick - stabbing himself with a drawing pin!
  • I Didn't Know That: Ep 4
    Is it possible to crack a safe using a stethoscope? Then, follow our duo as they go head to head in the bike versus underground train challenge.
  • I Didn't Know That: Ep 5
    Can Richard and Jonny survive the hottest chilli pepper in the world? Can Jonny beat the British Baked Bean Speed Eating record of 136 in 3 minutes?
  • I Didn't Know That: Ep 6
    Jonny tries a hurricane proof skydiving suit.Does Richard have any hope of spotting him in the ultimate camouflage outfit?
  • I Didn't Know That: Ep 7
    Is it possible to beat casinos at cards or roulette? Richard learns the tricks of the trade.
  • I Didn't Know That: Ep 8
    Which is stronger wood or steel? Ever wonder what is use to do a bowling ball? Watch Jonny as he slice open a bowling ball.
  • I Didn't Know That: Ep 9
    Join Richard and Jonny behind the scenes of a massive dam in Wales, experience the power of the water first hand by releasing the master stop valve.
  • I Didn't Know That: Ep 10
    Richard and Jonny explain how dams can prevent flooding, irrigate farmland, produce hydro-electric power and provide fresh drinking water.