2, nails, if nails are not invented, the process of human civilization will be seriously hindered, especially in ancient Rome more than 2,000 years ago.
3. compass. The first compass was invented between the 3rd and 6th centuries.
4. Printing machine: In about 1440, Johannes Gutenberg, a German, invented the first printing machine.
5. The internal combustion engine was formed in the middle and late period of19th century. The internal combustion engine led the whole industrial era and promoted the invention of a large number of machines.
6. Telephone. 1876, Bell was the first inventor to obtain a patent for telephone invention.
7. Light bulb. 1879, Edison invented a complete electric lamp function system.
8, penicillin, 1928, Scottish scientist alexander fleming made penicillin.
Contraceptive pills, natural contraception and herbal contraception have existed for thousands of years. Condoms began to be used in18th century, while oral contraceptives were invented by chemist Russell Mark in the late 1930s.
10, internet, in the 1960s, the Ministry of National Defense established a switching network to connect computers in institutions. This network is called ARPANET, which is the predecessor of the Internet.
Extended content: Edison invented the electric light in America, and George invented the robot in America.