On the topic of "which came first, the chicken or the egg", we will have a debate. Who can provide some materials for the debate?

This problem needs to be discussed in categories. 1, "egg" means "egg" in a broad sense? Such as "snake eggs" and "dinosaur eggs". In this case? There are eggs in the world? There are chickens in the back. Now it is proved as follows? According to Darwinian evolution? Birds evolved from reptiles. That is to say, before there were birds? There will be reptiles. As we all know? Reptiles are all "egg-born"? Like dinosaurs. That is to say? Before there were birds? There are already eggs. Chicken is a bird? So, chicken comes first, then eggs. The first egg in the world? There are chickens in the back. 2. "Egg" refers to "egg" in a narrow sense. In this case? The best chicken in the world? There are eggs in the back. Now it is proved as follows? As the name implies, "egg" is an egg laid by a chicken. How did the first chicken appear in the world? Do we need to discuss it separately here? ? 1? Some kind of female bird that is not a chicken for some reason? Gradually turned into a chicken when he was alive. . Let's name this bird a for the time being. So A is hatched from the "A egg"? The eggs it lays when it becomes a chicken are called "eggs". From this? The best chicken in the world? There are eggs in the back. ? 2? Some kind of bird egg that is not an egg, such as "Egg A", for some reason? A hen has hatched. Then the eggs laid by this chicken will be called "eggs" in the future. From this? The best chicken in the world? There are eggs in the back. In summary? 1? 2? Say? The best chicken in the world? There are eggs in the back. Same reason? There are eggs before chickens in the world. Complete the certificate.

Which came first, the chicken or the egg? Sina Technology News On July 14, Beijing time, according to foreign media reports, which came first, the chicken or the egg? This is a classic and often mentioned question, and it is also the ultimate mystery of philosophy and science that has lasted for hundreds of years. Now, with the help of advanced computing technology, British scientists have finally solved this mystery-the answer is that there are chickens before eggs. The researchers found that the structure of eggs depends on a kind of protein found in hens' ovaries, so eggs only exist in hens. This protein is called ovocledidin- 17 (OC- 17 for short), which is a catalyst to accelerate the development of eggshells, and eggshells are an indispensable factor to protect egg yolks and protein, so that chicken embryos can fully develop in them. Scientists from the University of Sheffield and the University of Warwick use a supercomputer to "magnify" the egg formation process. This supercomputer is called "Hector" and is located in Edinburgh. The results showed that without OC- 17 protein, the outside of the egg could not crystallize to form the eggshell. This protein transforms calcium carbonate into calcite crystals that make up eggshells. Calcite crystals exist in many bones and eggshells, but hens form calcite crystals faster than any species-6 grams of eggshells are produced every 24 hours. Dr Colin Freeman, from the Department of Engineering Materials at the University of Sheffield, said: "Some people have long suspected that eggs came first, but the scientific evidence we have now proves that chickens actually came first. Scientists have previously discovered OC- 17 protein, which is related to the formation of eggs, but after detailed research, we can know that OC- 17 protein actually controls the formation of eggs. This is a very interesting discovery. All kinds of birds seem to have protein who can do the same job. " John Harding, a professor of engineering materials at the University of Sheffield, said the discovery had other uses. He said: "It is interesting to uncover the mystery of hen laying eggs, and it also provides clues for designing new materials and technologies. Scientists have found innovative ways to solve various problems in materials science and technology from nature-we can learn a lot from it. "