Ciro Santilli  Sponsor 中国独裁统治 China Dictatorship 新疆改造中心、六四事件、法轮功、郝海东、709大抓捕、2015巴拿马文件 邓家贵、低端人口、西藏骚乱
Discovered by Marie Curie when she noticed that there was some yet unknown more radioactive element in their raw samples, after uranium had already been separated.
The uranium 238 decay chain is the main source of naturally occurring radium.
Video 13.
The epic story of radium by Institut de Radioprotection et de Sûreté Nucléaire (2013)
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