Data indicate that geopolitical tensions are affecting how scientists around the world collaborate on research projects. But "rather than uniformly shrinking, global academic networks are being reconfigured", says Marina Zhang, a technology and geopolitics researcher at the University of Technology Sydney, in Australia. Collaborations with Israel and Russia, and between China and the United States, are among those seeing such shifts.
The Nature Index is a database of author affiliations and institutional relationships. The index tracks contributions to research articles published in high-quality natural-science and health-science journals, chosen based on reputation by an independent group of researchers. The Nature Index provides absolute and fractional counts of article publication at the institutional and national level and, as such, is an indicator of global high-quality research output and collaboration.
Pressing challenges, from the climate emergency to pandemic preparedness, demand concerted efforts at the global scale. But the growth in the use of international sanctions since the Second World War, although mostly targeted at economic growth and military capacity, has also affected science and scientific cooperation (see 'Science, restricted' and Supplementary information for raw data). Many nations have suspended publicly funded collaborations with the scientific institutions of several countries, including Iran, North Korea and Russia.