In 3500 BC, human beings had a lot of trouble and thankless transportation. They could not transport many things or long distances. Fortunately, people soon invented this round thing, the wheel.
People have spent a lot of time on the connection between the wheel and the axle, and now they can finally happily pull their 20 kilograms of vegetables to the vegetable market in the morning. Of course, this invention is far more than that. Whether in the watch industry or in the engine of a car, the great changes brought by this small wheel can be seen everywhere.
2, nails
After man learned to cast metal, this important invention was finally realized by the ancient Romans 2000 years ago. Prior to this, fixing can only be done by the geometric structure of the object itself.
Obviously, nails are much more convenient than the previous geometric connection, not to mention the invention of modern iron screws, which greatly promoted the development of machinery industry.
3. Compass
Foreign media reported that China invented the compass in the 9th century to 1 1 century, but according to our historical records, the compass appeared in the Warring States Period BC.
In the Han Dynasty, this instrument, which was then called Sina, spread to Europe and Arabia through navigation, and finally promoted the arrival of the era of great geographical discovery.
Step 4 print
Printing is also a great change, and its core progress is to make movable type with metal molds. In ancient China, Bi Sheng first invented movable type printing. He carved fonts out of clay, arranged them with iron plates and made them into printing plates, which greatly improved the printing speed.
5. Internal combustion engine
The internal combustion engine that led the industrial revolution is the core power of many other machines. It converts fuel into power through the pressure of high-pressure gas on the piston. Through decades of efforts, engineers finally completed the design and construction of internal combustion engines in the second half of the19th century.
6. telephone
The telephone invented by Bell is undoubtedly one of the greatest inventions of mankind. Although many inventors had done basic research on the electronic transmission of sound before Bell, Bell was still the first person to be granted this patent.
Shortly after the invention, the telephone began to be widely used, and the frequency of use increased explosively, which completely changed global trade and communication. 1922 When Danbert died on August 2, 1922, the telephone service in the United States was even suspended for a minute to pay tribute to this great inventor.
7.light bulb
The invention of electric light finally made kerosene lamps gradually withdraw from the historical stage, making the night clearer and brighter. Speaking of light bulbs and Edison, we have to mention the classic saying that genius is 1% inspiration and 99% sweat.
8. Penicillin
The era of lawless infectious diseases was ended by an unexpected discovery. 1928, Scottish scientists found that their Petri dishes had no lid and all the bacteria were moldy. Moreover, as long as there are mildew spots, the bacteria are all dead. This kind of antibacterial mold is Penicillium.
9. Birth control pills
It has changed from a means of fertility to a way of leisure. More importantly, their use has greatly reduced the number of women and their families' children in the use areas, thus enabling the whole family to achieve a higher quality of life.
10, Internet
Ten thousand people, one million people, one billion people, when all the networked computers on the earth are connected into a network in the vast virtual space, data can be exchanged between any two places in the world-in the space of the Internet, the world is just the size of a notebook.