{"id":623540,"date":"2026-01-18T22:02:50","date_gmt":"2026-01-18T21:02:50","guid":{"rendered":"https:\/\/cronologia-universale.it\/january-21-1942\/"},"modified":"2026-01-18T22:02:50","modified_gmt":"2026-01-18T21:02:50","slug":"1937-24","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/1937-24\/","title":{"rendered":"1937"},"content":{"rendered":"<p>Through the observation of cosmic rays, muons, the first particles of the second generation, were discovered, opening up new and unexpected horizons in the standard model, so much so that Isaac Rabi exclaimed: &#8220;Who ordered that?&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Through the observation of cosmic rays, muons, the first particles of the second generation, were&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-623540","post","type-post","status-publish","format-standard","hentry","category-vg-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - 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