The centroid shift trajectory of CATs across different historical periods. Credit: Ma et al., 2025, PLOS One, CC-BY 4.0 Tombs found throughout China, built from the time of the 4,000-year old Xia Dynasty to the present day, offer insight into long-term social and political trends. This conclusion comes from a study published October 29, 2025 in the open-access journal PLOS One by Quanbao Ma of the Beijing University of Civil Engineering and Architecture, China, along with colleagues. The team