Pourquoi y a-t-il des pierres le long des voies ferrées ?
15:53
Why Railroads Don't Need Expansion Joints
36:24
How a Steam Locomotive Works (Union Pacific "Big Boy")
13:56
How petrol pumps know when to turn themselves off
4:46
Pourquoi n'ont-ils pas de parachutes pour les passagers des avions commerciaux ?
14:48
The Big Misconception About Electricity
11:36
Why Don't Ships Have Headlights?
9:29
How Dangerous Is A Bullet Shot In The Air? DEBUNKED
6:31