Dig a puddle on the earth, and after tens of billions of years, will fish be born in the pond?

Even though we humans have now initially entered the space age, the universe is really too big. So far, we have not been able to find other "extraterrestrial creatures", and the earth is still the only home for us humans. At the same time, it is currently the only planet with living organisms, so many are curious. Why can we produce living things on our earth, and can other planets have the opportunity to give birth to life forms?

In fact, our earth had no living creatures 500 million years ago, although our earth has existed for 4.6 billion years. In the preceding 4 billion years, the earth was also a dead planet. Until a huge star hit the earth and brought a lot of water to the earth. In this way, the earth had a rain that lasted for millions of years 500 million years ago, and the rain slowly gathered in the lower part to form the ocean. As the sun shines, some of this seawater evaporates, and then forms a dark cloud over the earth and finally continues to rain. Since then, the earth has formed a "simple ecosystem", and at this time the earth is still dead, and there is no sign of life.

But you said it was a coincidence that it didn't take long for a huge asteroid to hit the earth again. In this way, a huge explosion occurred on the earth 500 million years ago, and various emission line materials firmly shrouded the earth. Some of the radioactive materials from asteroids merged with the lava from volcanic eruptions on the earth. This is how simple amino acids appear after cross-coupling. Amino acids are important components of proteins, and they evolve slowly in this way. Some simple single-celled organisms appeared, and they were the earliest life forms on earth and the common ancestor of all living things on earth today!

Then it was simple, unicellular organisms evolved into multicellular organisms. Then evolved limbs from the ocean to live on land, and the era of biological diversity began in this way. Then some people are curious. In this case, can it be said that if you dig a small puddle on the earth and wait patiently for tens of billions of years, fish will be born?

From a theoretical point of view, it is indeed possible. After all, 10 billion years is too long, as long as the puddle exists. There is no problem in giving birth to some simple life forms. Because they are born in water, they are likely to evolve into fish first, and then evolve into reptiles! After all, the evolution of our earth from a dead planet to a "life planet" with more than 8 million species is the best proof, isn't it?