Einstein, his arrogance and rudeness offended most of his professors and teachers, so that he could hardly find a job. Soon his girlfriend got pregnant, followed by a hasty marriage. He needs a job, any kind of job, without the arrogance of his college days. In Bern, Switzerland, he found a job as a clerk in a patent office.

Despite the difficult situation, young Einstein was ambitious, and he was extremely eager to become a famous physicist, which made him immortal. In this magical year, he created an incredible record.

Engaged in a relatively easy job, young Einstein has enough time to think carefully at work and at home. In just a few months, he published several papers, which changed the classic natural science. Among them, the paper on the nature of light won him the Nobel Prize in physics, but ironically, the most influential paper on atomic discovery has nothing to do with either of the above two papers. This controversial essay is an analysis of the movement of pollen particles in water.

Scottish botanist robert brown once did an experiment. He sprinkled some pollen grains into the water and observed them with a microscope. He found a strange phenomenon, because those pollen grains did not float gently in the water, but kept moving irregularly, as if there were life.

At that time, although the so-called "Brownian Movement" was very strange, scientists soon forgot it. They find this phenomenon common and even boring. Who cares about the gently swaying pollen in water? But what does this swing have to do with atoms? After nearly 80 years, Brown's discovery is still a little-known abnormal scientific phenomenon, but later Einstein changed everything!

Based on amazing insight, Einstein understood that the fundamental cause of Brownian motion was atoms, and he realized that the irregular movement of pollen in water could completely end the fierce debate about whether atoms existed objectively.

His reason is simple. The fretting of pollen grains is caused by other substances. So Einstein said: water must be made up of small particles like atoms. These small particles are constantly moving by themselves, which leads to irregular movement of pollen particles. If there are no particles in the water, the pollen can only stay where it is. Einstein proved that the fact that leads to Brownian motion is the objective existence of atoms.

Einstein's paper stopped the oral debate. He proved with impeccable mathematical proof that the size of atoms can be estimated by the movement of pollen. It is very, very small, about one millionth of a millimeter in diameter. Looking at people's hair with the naked eye, it is very thin, but it is wider than 1 million atoms side by side. It can also be understood that the number of particles in a glass of water is far greater than the number of cups poured into the world's oceans! Einstein's paper put an end to the debate on whether atoms exist objectively, and atoms do exist.