/kloc-one night in February, 877, the staff of Mengluoyuan Laboratory trembled slightly, not because of the cold, but because they heard the recording for the first time in human history: "Ma Xuan has a little sheep, and its fur is as white as snow. No matter where Ma Xuan goes, the lamb is always by her side ... "

Everyone can understand how many applications this great invention has. The French government also awarded Sir Edison the title. Later, Edison improved the phonograph many times until he changed the drum type to bakelite turntable, which was not a matter of one or two years, but after decades of continuous improvement.

2. Copying machine

At first, Edison invented paraffin paper, which was only widely used as packaging material for food and candy. Later, he tried to carve the outline of the words on wax paper to form a wax lettering paper tray, put white paper under the paper tray, and then rolled it off the wax lettering paper with an ink roller. A wonderful thing happened, and clear handwriting appeared on the white paper. After many improvement experiments.

From 65438 to 0976, Edison began to produce the copier he invented, and all of a sudden, institutions, schools, institutions and organizations adopted this kind of wax paper mimeograph. Because Edison's copier is so popular and popular all over the world, Edison deeply realized that he should invent something that people generally and deeply need.

3. Newton

Newton was alone in the orchard at home. Because he walked and thought, he accidentally bumped into an apple tree in the garden. At this moment, an apple just hit Newton's head. Newton suddenly woke up from the problem and picked up the apple. At this time, he fell into another problem: why did the apple fall to the ground instead of floating in the sky? Finally, Newton put forward a universal law of the simplest phenomenon: gravity.

4. leonardo da vinci

When it comes to Leonardo da Vinci and his inventions, you'd better ask such a question: "What didn't he invent?" Because he invented many things. There are many design drawings in Leonardo da Vinci's work log, but the most noteworthy is the design of the calculator. Imagine what science would be like without simple and complicated mathematical operations.

Leonardo da Vinci was the founder of the Renaissance. He can draw (such as the famous Mona Lisa), sculpt and invent. His diary has fascinated the whole world so far, describing many things from the human body to helicopters and tanks.

Da Vinci's diary is as long as 13000 pages, which still affects scientific research. In 2005, a British surgeon used the method designed by Leonardo da Vinci to perform heart repair surgery, which was surprising in itself. It would be amazing if you knew that Leonardo da Vinci knew nothing about the working mechanism of the human circulatory system at that time.

5. alexander bell

"Can you hear me?"

"Yes!"

Thanks to the telephone invented by alexander bell, we can hear each other's voices. There are so many telephone providers now, but it is thanks to alexander bell that Bell Telephone Company, the first (and most powerful) telephone company in the world, was created.

Bell is not only a single genius, his research ideas involve air conditioning (in fact, he built the original air conditioning system in his room), hydrofoil and the concept of magnetic storage information (which led to an unprecedented innovative invention-computer).

Alexander bell was also the inventor of the world's first metal detector. He assembled this device to find the bullet in President james garfield's body. As a result, the detector did work, but the position of the bullet could not be determined because President Garfield was lying on a metal shelf during the inspection.

Extended data:

The invention of lightning rod;

There is a well-known story about the invention of lightning rod in history. 1752, 46-year-old American scientist Franklin made a kite out of silk and put it into the sky with a string in a stormy weather. The lower end of the hemp rope is tied with a metal key. When the hemp rope is wet by rain, the key becomes a conductor.

At this time, he put his hand close to the key and suddenly saw the electric spark jumping between the key and his finger. At the same time, he felt a sharp pain in his fingers. This experiment proves that thunder in the sky is actually a large-scale discharge phenomenon. Therefore, Franklin thinks that if a metal wire is installed in a tall building and the lower end of the metal wire is grounded, according to the principle of tip discharge, the danger caused by lightning strike to the building can be avoided.

This led to the invention of lightning rod. Because of the invention of lightning rod, the world in which human beings live is a little safer. The invention of lightning rod seems to be an accident. A coincidence made a great man have a whim and produced an invention.