8 random facts about everything around us, thought very familiar but 90% don’t know

Throughout the development of history and society, around us have appeared countless strange things, inventions and majestic natural wonders. Even when you think that you are a person with quite a wide understanding or a person with outstanding wisdom, knowledge is still an endless void that can never be filled.

So, at any age, there are some surprising facts about this world. While it may not promote our daily lives much, they will certainly make us feel surprised about the objects and events around us.

1. A messy bed is better for our health

Being organized and clean will definitely make our living environment more airy and comfortable. However, making the bed seems to go against this standard.

According to a new study from Kingston University, leaving bed sheets indiscriminately on the mattress can kill about 1.5 million dust mites, thereby protecting our health better than folding blankets. after get up.

2. Men have longer tongues than women

The common misconception that women talk more than men are hard to confirm. However, when it comes to tongue length, men are definitely ahead. Accordingly, a study conducted at the University of Edinburgh confirmed that the average tongue length of adult females is 7.9 cm and for males it is 8.5 cm.

3. Eiffel Tower can be 15cm taller during summer

One of the most famous landmarks in Europe cannot fail to mention the Eiffel Tower. Besides its symbolism, the fact that this architectural wonder has a slight seasonal change in elevation also surprises many people.

In the summer, when the temperature is above 40°C, the Eiffel Tower grows nearly 6 inches (about 15 cm) tall and this is not difficult to explain when metallic materials experience an expansion state when exposed to high temperatures, leading to an increase in the height of the tower. In addition, the heat can also cause the top of the tower to tilt up to 17 cm in the summer.

4. YouTube started out as a dating app

Referring to YouTube, people immediately imagine a globally famous video viewing application, which is a symbol of the strong development of social networking platforms. However, few people know that it was not originally created with the same purpose as it is now.

According to its founder, Steve Chen, when YouTube launched on Valentine’s Day February 14, 2005, the original idea was to let people upload their own videos where they would talk about their romantic interests. and the type of partner they’re looking for, like a “video profile” to find people who want to date them. Later, people shared everything about themselves and created the YouTube community that it is today.

5. Men with daughters live longer

According to one study, we can’t be sure if fathers with daughters are happier than fathers with sons, but having a daughter may be thought to help fathers live longer. than.

A team of scientists found that the number of daughters positively affects the life expectancy of their fathers. Accordingly, on average, their life expectancy increased by 74 weeks for each daughter born. On the other hand, the number of sons did not have any noticeable effect on the life expectancy of fathers.

6. Homework was once considered harmful to children’s health

The assignment of homework to children is not malicious, but it is also a matter of debate for many people. In the US, a ban on homework was introduced in 1901 in California to students under the age of 15 when some doctors and teachers argued that homework had a negative impact on the health of students. children because it causes them too much stress.

Even so, the assignment of a sufficient amount of homework was still difficult to disprove, so homework assignment was authorized back in 1917.

7. Lobster used to be prison food

As one of the expensive ingredients often used in high-class restaurants, few people know that lobster was once a dish for prisoners.

Accordingly, in the 1880s, the number of lobsters was so abundant that they covered the beaches of the Massachusetts Bay Colony, USA. As a result, it is affordable and is called a “poor protein” as well as the food of choice for prisons for their prisoners.

8. Eraser was invented 200 years after the pencil

Although pencils have accompanied us for more than 400 years, it took a long time before the beautiful little eraser on the back of the pen came into the world, specifically about 200 years.

In the 18th century, before rubber was used as the main ingredient to make erasers, people used sponges or even bread crumbs to cover pencil marks or erase mistakes.

The use of rubber to make erasers actually originated from an accident when in 1770, Joseph Priestley used vegetable gum to remove pencil marks. Since then people began to invent erasers based on the properties of chewing gum.