According to foreign media reports, modern medical technology has made brain surgery safer than ever before. In fact, the practice of venturing into human skulls to repair something can be traced back to our ancestors. Recently, the remains of a man who had been involved in a brain operation – and apparently failed – in a cave system in Spain. < / P > < p > it is reported that the cave has been a hot spot of archaeological discovery in the past, where researchers found the remains of two individuals living at least 4800 B.C., as well as the remains of a young goat and some stone tools. < / P > < p > the remains, including two skulls without jaws, were found in the Dehesilla cave. One of the skulls is particularly interesting because it shows signs of an unfinished ancient operation. A large depression in the skull suggests that the man had been operated on by Stone Age “doctors” for unknown reasons. < / P > < p > as pointed out in LiveScience, it is not entirely uncommon for skull cavities or fragments to be lost during this period. This process is known as drilling, and it may be for relief of disease, or for religious or spiritual purposes. In this case, the operation was not completed. The dent was obvious, and based on signs of new bone growth in the skull after the injury, it could be concluded that the man did not die of the ordeal. On the contrary, stone age surgeons might have given up surgery before the skull was broken through, which we can’t be sure about. < / P > < p > it is reported that the two men who were found to be regretful died much later than brain surgery, and the cause of their death is not known. A young goat was buried with them, and the remains of an ancient fire pit were found nearby, so this suggests that it may be a place for sacrifice. Both of them may have died naturally or have been killed. It’s hard to say because it’s only the skull. The iPhone 12 keynote has been recorded in Apple park