1. Newton discovered that the earth has gravity
Once, Newton went to play in the countryside and rested under an apple tree. Suddenly, an apple fell from the tree. He thought it was strange, why did the apple fall from top to bottom instead of from bottom to top? He returned home to study with this question, and new related questions continued to arise, so he continued to study, and he discovered that the earth has gravity and can attract objects. Later he studied "Newton's Physics of Gravitation".
2. Edison invented the electric light
At the beginning of the 19th century, people began to use gas lamps (gas lamps). However, if the gas was supplied through pipelines, it would be very easy to cause trouble if there was leakage or blockage. People are very eager for the reform of lighting. In fact, Edison set an impossible task for himself: in addition to improving lighting, he also needed to create a power supply system.
So he and his partners in Mengluo Garden worked tirelessly It took more than 1,600 experiments with heat-resistant materials and more than 600 plant fibers to create the first carbon filament light bulb, which can burn for 45 hours at a time. Later, he continued to improve the manufacturing method on this basis, and finally launched a bamboo filament light bulb that can burn for 1,200 hours.
3. Mikaelson wrote "The Origin of Continents and Oceans"
More than 60 years ago, a biologist named Mikaelson discovered that the east coast of the United States and Europe There is a kind of earthworm in the West Coast at the same latitude, but there is no such earthworm in the West Coast of the United States. Why is this? This question attracted the attention of Wegener, a German geologist who was studying the origin of continents and coasts.
Wegener believes that the small earthworm has limited mobility and cannot cross the Atlantic Ocean. Its distribution just shows that the European continent and the American continent are connected together. It split into two continents. He took the geographical distribution of earthworms as one of the examples and wrote it in his famous book "The Origin of Continents and Oceans".
4. Lu Ban invented the saw
During the Spring and Autumn Period and the Warring States Period, there was an inventor named Lu Ban in our country. Luban's original surname is Shu, and his name is Ban. Because he was from the state of Lu, people respectfully called him Lu Ban. He was mainly engaged in carpentry. At that time, people had no good way to make trees into flat and smooth boards.
It is said that one time when he went into the mountains to cut down trees, his hand was accidentally scratched by a leaf of a weed. He took off the leaf and touched it gently. It turned out that there were sharp teeth on both sides of the leaf. His hand was scratched by these small teeth. He also saw a large locust on a weed. The two large teeth were also lined with many small teeth, so they could grind the leaves quickly.
Luban was inspired by these two things. He thought that if he had such a toothed tool, wouldn't he be able to saw through trees quickly? So, after many experiments, he finally invented a sharp saw, which greatly improved work efficiency.
5. Fleming discovered penicillin
Fleming was a British scientist and the discoverer of penicillin. When Fleming was a military doctor, he saw many soldiers dying in pain due to bacterial infections in their wounds, and was determined to find a drug to treat diseases caused by bacteria. During his experiments, he accidentally discovered penicillin. This miraculous drug has saved countless lives. This is a success achieved through the joint efforts of him and several scientists.