Scientists just made a wild new crystal that can literally 'breathe' oxygen in and out, kind of like plants and animals do! This could be a game-changer for fuel cells (think cleaner energy) and even smart windows that adjust to the weather. The secret? A mix of strontium, iron, and cobalt that works at much lower temps than usual. The only catch: cobalt is pricey and tricky to source. Still, this is next-level material science! #Science #ScienceNews #Innovation