I Didn't Know That
I Didn't Know That
Nobody does documentaries better than National Geographic Channel. Everything is covered - from how we live to where we live, to all that's ...
Crop Circles
An extra-terrestrial I Didn't Know That investigation probes the mysterious forces crafting paranormal patterns in our crop fields. Your ...
Concrete Bomb
Richard and Jonny explode back onto your screen with their most spectacular experiment yet. They're comparing the effectiveness and ...
Johnny Quicksand
Do not try this at home or anywhere else you find sand, water and unpredictable tides. Jonny goes to frightening lengths and depths to find ...
Green DIY Energy-cycle illuminating pedal-power
Exploring alternative energy, Richard and Jonny show how simple it is to make your own power supply - while burning off a few pounds in the ...
Safe-cracking Underground action
Everyday objects, extraordinary science, in episode 10 of I Didn't Know That.
Huge Home Savings
Green guru Joanna Yarrow shows Richard and Jonny how simple changes in the home can save the environment ? and enough cash for a lavish ...
Green Grand Prix
Industrial scientists Richard and Jonny race four different green cars to see which lasts the longest on just £1 of fuel in the tank.
Rockets & Lies
Launching into more exciting experiments, Richard and Jonny reveal how a simple stick led to a revolution in rocketry. Also ? another urban ...
Mail & Martial Arts
How machines can read the worst writing ... and in a stark demonstration of mind over matter, Richard attempts to break bricks with his ...
Snipers & Supermarkets
Can a sniper really hit a target more than a mile away with a single bullet? Plus: Richard and Jonny have supermarkets in their sights; how ...
I Didn't Know That Episode 10
Everyday objects, extraordinary science, in episode 10 of I Didn't Know That.
I Didn't Know That Episode 9
Everyday objects, extraordinary science, in episode 9 of I Didn't Know That.
I Didn't Know That Episode 8
Everyday objects, extraordinary science, in episode 8 of I Didn't Know That.