Researchers at @EuropeanXFEL have created a state of #matter as it occurs in the interior of #planets or during #inertial confinement #fusion. They also open up a way to measure extremely short phenomena #attosecond #physics
https://www.xfel.eu/news_and_events/news/index_eng.html?openDirectAnchor=2426&two_columns=0

https://nachrichten.idw-online.de/2024/07/29/when-copper-becomes-transparent-european-xfel-creates-exotic-matter