Do you know the names of the three wise monkeys? They are: Mizaru (See no evil), Mikazaru (Hear no evil), and Mazaru (Speak no evil).
An atomic clock is accurate to within 1 second in 1,7 million years.
Thomas Cook, the world's first travel agency in the world, was founded in 1850.
A fathom is 1,8 metres (6 feet).
There are more TV sets in the US than there are people in the UK.
Before the year 1000, the word "she" did not exist in the English language. The singular female reference was the word "heo", which also was the plural of all genders. The word "she" appeared only in the 12th century, about 400 years after English began to take form. "She" probably derived from the Old English feminine "seo", the Viking word for feminine reference.
There are no letters assigned to the numbers 1 and 0 on a phone keypad. These numbers remain unassigned because they are so-called "flag" numbers, kept for special purposes such as emergency or operator services.
After the French Revolution of 1789 selling sour wine was considered against national interest and the merchant was promptly executed.
For 3000 years, until 1883, hemp was the world's largest agricultural crop, from which the majority of fabric, soap, paper, medicines, and oils were produced.
George Washington and Thomas Jefferson both grew hemp. Ben Franklin owned a mill that made hemp paper.
The US Declaration of Independence was written on hemp paper.
The word malaria comes from the words mal and aria, which means bad air. This derives from the old days when it was thought that all diseases are caused by bad, or dirty air.
The names of all the continents end with the letter they start with.
On every continent there is a city called Rome.
The oldest inhabited city is Damascus, Syria.
The first city in the world to have a population of more than one million was London, which today is the 13th most populated city, with about 8 million residents.
The most populated city in the world - when major urban areas are included - is Tokyo, with 30 million residents.
Tokyo was once known as Edo.
The pin that holds a hinge together is called a pintle.
The Vatican is the world's smallest country, at 0,44 square km (0,16 square miles).
The US flag displays 13 stripes - for the original 13 states
