This is my Pioneer Plaque：
What we can see in this motion picture is a man drilling a tree branch for fire. According to archaeologists, humans started using fire about a million years ago. This is an extremely historic moment, before that, people could only eat raw meat, and cold food, which not only tastes bad, but is also prone to parasites and other safety issues. After drilling wood to get fire, people began to be able to cook with fire, defend themselves against wild animals, have activities at night, and have the help of warmth in winter. The advent of fire took human evolution to the next level, so to speak. Oh, have to want you to explain what fire is, from a chemical point of view: the fire we see is a luminous heat phenomenon in the form of a flame when a combustible material undergoes a rapid oxidation reaction with oxygen. The color of the flame is related to the temperature of combustion and energy changes. For example, sodium atoms get energy at high temperatures and turn into an excited state, but the excited state is not very stable and will automatically release energy back to the ground state. It releases energy equivalent to 589.6nm and 589nm two wavelengths of light, so the sodium burning flame is yellow. From a physical point of view: fire is the light and heat generated by the combustion of substances, its nature is the expression of energy and electron jumps
Returning to the main topic, I would also like to emphasize that fire also played a very important role in the various revolutions that followed in the following thousands of years, such as the mechanical revolution. Perhaps you will have heard that there was a Greek named Prometheus who brought fire to mankind, but this is from mythology, that is, a story, and we can’t be sure whether it’s true or not.
The current human technology I’d like to pick is, as you can see, GIF. I understand that the logic of your language is synchronized and concurrent, whereas we earthlings speak in a linear progression, which can make it inconvenient for you to read. And gifs are a great way to solve the problem. With just the animated content of a GIF, we earthlings are able to understand what the sender is trying to convey through the motion picture, possibly explaining a concept, or expressing anger or helplessness. Of course, it will be a bit difficult for you guys to understand the deeper meaning behind the motion picture, but I believe that you should have no problem simply understanding what the picture brings. Although we have only two hands and two feet, which is different from you, you will be able to understand by analogy what would happen if you were to change from a seven-legged hand to a two-legged one. I see that you can convey the meaning of our words through a single symbol, and that is very impressive!
So I was looking for a similar medium on Earth, and I found theGIFs!