In 1915, the German army built an electric fence on the border between Belgium and the Netherlands to stop people from Belgium escaping to neutral Holland.
The Boeing airplane
The Boeing 747 has been in service for 35 years and has transported 3.6. billion people (2005).
Suicide in Las Vegas
Visitors to Las Vegas are 2-4 times more likely to commit suicide than visitors to other US cities.
What is Wolfenstein?
Wolfenstein 3D is a computer shooter game made by ID software and published on May 5, 1992 for DOS.
Where does the quill pen come from?
The quill (feather writing instrument) is often from geese and especially the five outer wing feathers from the left wing were suitable as they have a curvature that suits right-handers.
The pressure of a woman and an elephant
A woman wearing stiletto heels exerts more pressure on the ground than an elephant does – even if it only stands on one leg.
How many bacteria are in headphones?
Just by wearing headphones for an hour, the amount of bacteria in the ear can increase up to 700 times.
How big is the world’s largest dripstone?
The world’s largest dripstone is 67 meters high and stands in a completely dark cave in Cuba.
