🧪 What is really connected with January 2 in chemistry

⚛️ Early publications on radioactivity (late 1890s - early 1900s)

In the first days of January, Marie Skłodowska-Curie and Pierre Curie prepared and sent reports and notes to the French Academy of Sciences.
🔹 Formally, radium and polonium were announced in December 1898,
🔹 but January 1899–1900 is the moment when the topic of radioactivity became “official” for the scientific world.