Workers in reflective vests, hammering and chiseling the stones of the Great Pyramid of Giza—this sight outraged thousands of tourists and netizens who watched the surprising footage from Egypt.

which were often created by hammering and chiseling marks into stone. “They are not just art, they are special markers imbued with meaning,” Hora said. These artifacts hold historical ...

The typical machining SEM figures represent the comparison between EV-chiseling and EV-cutting, and the depth of cut is 10 μm. Credit By Zhiwei Li, Jianfu Zhang, Zhongpeng Zheng, Pingfa Feng ...