Why commercial planes usually fly at 9-13 km altitude?
Getting used to the miracles of technology is the strangest human trait. People are sitting at an altitude of 12 kilometres without...
Why side mirrors in the US have a long warning?
Side mirrors of cars in the United states have a very long warning etched on them - "Objects in the mirror are...
Front-wheel-drive Megola motorcycle wasn’t able to stop
Motorcycle riders know that the city is not the best place to have two-wheeled fun. Traffic lights, crosswalks, traffic jams - you...
Why fire buckets usually do not have a flat bottom?
A bucket is one of those tools that we would find in every house. Fire buckets are much rarer, but you can...
Lazy Dog – an aerial bomb without any explosives
Well, ok - Lazy Dog is technically not a bomb. It is an American kinetic munition, used extensively during the Vietnam and...
Scott Sociable looks like it lost a wheel, but it was actually built like...
There are different types of three-wheeled cars. Some have two wheels in the front and one in the back, others are the...
Why do ships have bulbous noses which normally stay under the waterline?
If you ever took a walk around the harbour, you would notice that some ships have their noses slightly out of the...
If suicide doors were so dangerous, why some cars had them?
Did you know that many cars of the early 20th century had suicide doors? That's what they call rear-hinged car doors, because...
Why hot air balloons still have wicker baskets?
A hot air balloon is a relatively simple aircraft. It is just a thin fabric balloon with a wicker basket underneath (with...
7 interesting facts about the amazing plumb bob
We could hardly find a simpler tool in the arsenal of a modern carpenter. Plumb bob is just an axially symmetrical weight...
Luxury trains used to run on paper wheels
"You're like a train with paper wheels" - this sounds like an insult, doesn't it? However, train wheels made from paper actually...