【#Tech24H】An international research team, including the Massachusetts Institute of Technology and Chengdu University of Technology, has discovered rare remnants of "primordial Earth" in ancient rocks. These materials formed before the "giant impact event" 4.5 billion years ago, which reshaped Earth's chemical composition, and may represent the first surviving evidence of "primordial Earth" material found by humans. The discovery provides new clues for scientists to piece together the "initial puzzle" of early Earth and the formation of the solar system.