(Phys.org)—A team of researchers working on the CERN Axion Solar Telescope (CAST) project report passing an important milestone in their search for the axion—they have moved below established astrophysical constraints and are now working in an area that is expected to reap many rewards regarding both the axion and other avenues of physics research. In their paper published in the journal Nature Physics, the team describes their work, what they have found, and what they believe is on the horizon. Maurizio Giannotti with Barry University offers a News & Views piece in the same journal issue covering the history of the axion, the work done by the CAST team, and where future research in the area is likely headed.