Moon Mountain

The tallest mountain on the moon isn't the tallest object. A ridge that was thrown up by an impact is taller. 

The tallest mountain on the moon is called mons Huygens. It is 5 & ½ km high at the peak. Smaller than many of Earth's mountains, but still very tall. 

The selenean Summit is a similar height to Everest on earth but it is not a mountain but the side of an impact crater. It is 10.7 km tall, slightly higher than Everest and at the height of commercial jet cruising altitude on earth. 

Sources 

Wikipedia | Mons Huygens

Wikipedia | Selenean Summit

Surface Area of Britain

The surface area of the Island of Great Britain is 209,331 km². That means if Britain was squashed into the shape of a square, it would be roughly one 5th of a million square millimetres. 

image generated by artificial intelligence 

If there was a country that is has a surface area of 1 million square kilometres, it would be 5 times the size of Britain. 

Queue

All the letters in the word Queue are silent except the letter 'Q'. 

image created by AI 

Angels With Filthy Souls

In the Christmas movie 'Home Alone', Kevin is seen watching a gangster movie called 'Angels With Filthy Souls'. 

Image generated by AI

According to the director, the movie doesn't exist, they shot that one clip themselves for the movie.

Contactless Payment

When you use a bank card to make a contactless payment several things are happening. A moving magnetic field causes induction to a thin layer of metal In the card, that gives the card a small electric charge. 

Image generated by artificial intelligence (wonder) 

Then a small microchip on the card sends a series of pulses to an antenna and that transmits a weak radio signal called near field. Then the machine reads the data though the air. 

Your bank card is basically a compact radio transmitter. 

Squid Game Doll song

In the Netflix series called Squid Game, the English translation of what the doll is singing is "Red light Green light 123", over and over again. 

Image generated by artificial intelligence (wonder). 

British Plug

The British polwer plug, also known as the type g plug is used in over 50 nations around the world from Saudi Arabia to various nations in Africa and even on Hong Kong island. It can handle a current as big as 15 amps but usually has a fuse that blows when the current at 13 amps. 

Image taken from my camera in my home

The ground pin at the top of the plug has 4 uses. It works as a key and opens spring loaded shutters for the live terminals as the plug is pushed in. It also turns on the circuit breaker if a strong current flows through it and that prevents electrical fires caused by a short circuit by turning off the whole loop.  It also safely carries an overloaded current back to the main transformer of the building preventing electic shock from a faulty appliance. If that fails the fuse will blow instead. The pin at the top of the plug also creates friction that makes the plug less likely to slide out of the socket unintentionally.