Let's accept it - most of us have had our own Jon Snow moments when that condescending inner voice inside our heads told us ' You know nothing '. The most recent one came when I was doing some research for an article but then one hyperlink led to another and I ended up in a trench full of bizarre facts that, well, blew my mind. Here are 25 bizarre facts you might think they’re lies.

• People at the time of Christopher Columbus didn't believe the world was flat, and nobody was worried he was going to sail off the edge of the world. (The idea that Flat Earth theory dominated the middle-ages is a 19th-century invention.)

• The Great Wall of China is not visible from space. No single human structure is visible from orbit, but you can see cities at night.

• Goldfish don't have a memory of three seconds. They can actually remember things for quite a long time.

• Sherlock Holmes never says "Elementary, my dear Watson" in Arthur Conan Doyle's stories.

• Einstein didn’t fail in Math. He failed an entrance exam for a school but still excelled in math.

• There is an entrance exam in India where you can apply to be part of the Swiss Guards in the Vatican.

• ‘Vella’ comes from the word ‘available’.

• If you make a face and a strong wind is blowing, the shape of your face changes for a few hours.

• Bats are not blind. Not only they can see, but they also use echolocation.

• Bulls are colour-blind. They actually perceive the motions of the bullfighter’s cloth as a threat.

• SOS (Save our Ship) doesn’t stand for anything. SOS became a Morse code distress signal because it’s so easy to transmit: three dots, three dashes, three dots.

• Adam and Eve ate the forbidden “Fruit” of the tree of knowledge. Nowhere in Genesis does it say it was an apple.

• Everest is the tallest mountain only above sea level. If you measure Hawaii’s Mauna Kea volcano from its underwater base, it stands more than 33,000 feet tall – 4,000 above Everest.

• Scientists have predicted that after years of chewing gum, the shape of the human jaw will change by the 27th century.

• The UN Peace-keeping soldiers have to collect every shell of every bullet they fire.

• Brackets were invented to denote the gesture you make when whispering into someone’ ears.

• The rhythmic sound of a moving train can actually hypnotize some passengers.

• Bunk beds were invented by couples with children who wanted to have sex, at a time when there was no concept of the ‘bedroom’.

• Death metal was invented by an exorcist.

• McDonald's has no outlets in Bhutan because there is a battle in the Bhutanese court about the use of the word ‘happy’.

• The word ‘dictionary’ is never used in the dictionary.

• Egyptologists say the ancient construction job of Pyramids was a great honour granted only to respected labourers (no slaves), who remain entombed near the site today.

• The ‘ black uniform’ of ninjas comes from years of fiction and folklore. Real Ninjas wore anything that would help them blend into daily life.

• Kho- Kho was a working-class uprising against musical chairs. Because not too many people had chairs back in the day.

• Fastest bowlers in the world belong to the Sentinelese people in the Andamans. But because they reject the outside world, these players cannot play.