Meteorite reveals rare unstable element | EarthSky.org


This is interesting because curium is a post-uranium element, which implies that it was man-made.  This article shows that it has a stellar origin as a decay product of uranium (which would have formed through the process of supernovas).  This will, I believe, also require an editing of current introductory chemistry textbooks.


 

A pink meteorite inclusion nicknamed Curious Marie shows that a highly unstable element, curium, was present in the early solar system.

Source: Meteorite reveals rare unstable element | EarthSky.org

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