Hidden citations (IMAGE) PNAS Nexus Caption This network displays 880 foundational physics papers as nodes and halos. Node size corresponds to explicit citations, while halos represent hidden citations. Larger halos indicate more hidden citations. Links connect papers if they have a minimum of 20% co-citations in their arXiv citations. Blue: high energy. Red: condensed matter. Yellow: quantum. Green: astrophysics. Gray: other fields. Credit BarabasiLab [Alice Grishchenko (alice.ccnr@gmail.com), Xiangyi Meng (x.meng@neu.edu), and Albert-László Barabási (alb@neu.edu)] Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.