A heart of 380 million years ago?How complicated the species evolution process is

Science Fiction Network September 16th (Wang Xiuxia) Recently, researchers found a heart from 380 million years ago in ancient fish fossils, which is the oldest heart that has so far. In addition, the researchers also discovered a separate fossil stomach, intestine and liver, which provided new clues to understand the evolution of human body. Related studies were published in the magazine of Science.

Professor Kate, the chief researcher, said, "As a paleontologist who studied fossils for more than 20 years, I was surprised. We found a 3D and preserved heart in a ancestor of 380 million years ago. Usually, evolution, evolution, It is considered to be a series of small steps, but these ancient fossils indicate that the evolution process has a greater leap between jaw -free vertebrates and jaw vertebrates. " To this end, Professor Kate showed us a 3D model of a complex S -shaped heart. The heart is in the joint of the two cavities, and the smaller chamber is at the top.

After research, all organs detected in fish fossils are not much different from fish in modern society. However, some hard bone fish today, such as lung fish, evolved from fish tadpoles, but did not find any lungs in fish fossils. This shows that the evolution process is faster and more complicated than we think.

In response, the professor of Upsara University also expressed his opinion: "The true special feature of this fossil fish is that their soft tissue is preserved in three -dimensional space, unlike most soft tissues, as preserved in flat fossils. We are also very lucky, because modern scanning technology enables us to study these fragile soft tissues without destroying them. Decades ago, this project was impossible, but now we have done it.

All in all, these characteristics of fish fossils have been developed in early vertebrates, and how the head and neck areas have begun to change to provide a unique window to adapt to the jaw, which is also the key stage of our own physical evolution.

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