LATEST ARTICLES
Did you know early car headlights had to be filled with water?
Early passenger cars with internal combustion engines, built in the late 19th and early 20th centuries, were engineering marvels of their time....
Do spiral staircases really have a traditional direction?
Spiral staircases are common in both historical architecture and modern homes. You’ll find them in lighthouses, castle towers, bell towers, and even...
What are those yellow rectangles between the railway tracks?
While waiting for a train, you may have noticed yellow rectangular devices installed between the rails. They look small and unimportant —...
Why tanks don’t destroy asphalt when they drive on roads
A modern main battle tank can weigh 60 tonnes or more. These are extremely heavy, powerful machines. Yet in peacetime they often...
What are those spinning discs on ship windows?
A walk along the pier can make for a pleasant evening. Watching the ships is interesting even if you have no real...
What’s the highest altitude at which an aircraft has ever hit a bird?
Bird strikes are dangerous and have caused many aviation incidents. They usually occur during the most sensitive phases of flight – take-off...
How thick is the ice in an arena ice rink?
What kind of water is used to pour ice for competitions? How thick is it? How is it removed afterwards?
What is the tire pressure of a commercial jet?
Commercial airplanes are large and complex machines with many critical components, but some of them are a bit more familiar to us...
Should all cars have centerlock wheels? No
How many bolts or nuts are holding each wheel of your car? That number is probably 4 or 5, but why not...
What is the fastest submarine in the world?
Ships are not very fast, compared to ground vehicles. Even an old beater car can easily go 130 km/h (or much faster)...
Scary arrival – why planes sometimes land hard on purpose?
Most travellers have experienced this feeling. The entire flight goes smoothly, but at the very end, the plane touches down so roughly...