Inventory of 19 scientific "cold knowledge" that you might not know about

In UK, science and technology are optional subjects in primary and secondary schools. To stimulate students' keen interest in science and technology, several science and technology associations in UK have specially organized scientists to select dozens of very interesting science and technology knowledge. For many, this knowledge may be unheard of.

The gossip that netizens post on social media every day is enough for a 10 million page book.

The world's first mouse was made of wood.

When idle, a microwave oven consumes much more electricity than when heated.

Back in 2011, a 75-year-old woman in Georgia cut a fiber optic cable, causing internet outages in Armenia, Georgia and Azerbaijan for more than 5 hours. This has never happened before.

The technology used in smartphones is owned by 250,000 independent copyright holders or organizations.

The weight of entire Internet is only 50 grams, which is equivalent to weight of a large strawberry. The scientists calculated this result based on weight of individual electrons and number of electrons in Internet.

The world's first text message was "Merry Christmas".

Engineers have created a bionic arm that can be controlled using iPhone software.

The height of Eiffel Tower is not fixed, since difference in height is 15.3 cm when temperature changes.

When a nightingale begins to sing, its decibels are louder than those of a chainsaw.

Statistically, risk of going to work is no less than risk of war. Deaths from overwork and possible accidents on way to work all add to risk factors.

Each pencil lasts almost equivalent of writing 45,000 words or drawing a line 56 kilometers long.

Arabic numerals were first invented by Indians, later mastered and improved by Arabs, and began to spread in Europe and Asia.

Human height at night is about 1% less than in morning.

If there are 23 people in a room, there is a 50% chance that two of them have same birthday. If there are 75 people, there is a 99% chance that two of them have same birthday.

If human ear can hear low frequencies below 20 Hz, then we can even hear sound of muscle activity.

Ocean pollution is very serious, with an average of 46,000 pieces of trash per square mile.

50% of human and banana genes are same.

25% of bones of human body are in legs.

A person can circumnavigate the earth three times in a lifetime.

Most toilet seats are cleaner than toothbrushes due to amazing amount of bacteria on teeth. On average, there are about 10 billion bacteria per square centimeter. If you brush your teeth every day, your toothbrush will not be clean.

About 200 B.C. e. The Incas in modern Peru used as a unit of time time it took to boil potatoes. For example, it takes about one unit of time to cook potatoes after a meal.

Mosquitoes have killed more people than all wars in history combined.

Cats can make over 100 different sounds, while dogs can only make 10.

10 If you were to drill a hole at one end of earth, walk straight to other end of earth, and then jump out of hole and exit at other end, it would take about 42 minutes and 12 seconds.

Light travels 18 million times faster than raindrops.

There are still 89.5% of oceans on Earth that have not yet been explored by humans.

Press harder on peanut butter and it will turn into diamonds. Scientists have created diamonds from peanut butter in laboratory.

If we shrink Sun to size of a white blood cell, and then zoom out on Milky Way, Milky Way becomes size of the United States.

If you scooped up a spoonful of soil, there would be more microbes in it than entire population of Earth.

The world's smallest carbon nanotube is thinner than one ten-thousandth of diameter of a hair.

A lightning strike contains enough energy to bake 100,000 loaves of bread.

The ozone layer does not have an unpleasant odor, only a little geranium.

The most likely time of day for rain is 7 a.m. and least likely time of day is 3 a.m.