Meteorite contains the oldest material on Earth: 7-billion-year-old stardust. The ancient stardust reveals a 'baby boom' in star formation Field Museum, January 13, 2020 https://www.sciencedaily.com/releases/2020/01/200113153306.htm https://www.sciencenews.org/article/ancient-meteorite-stardust-oldest-ever-examined-lab
The paper is; Philipp R. Heck, Jennika Greer, Levke Kööp, Reto Trappitsch, Frank Gyngard, Henner Busemann, Colin Maden, Janaína N. Ávila, Andrew M. Davis, Rainer Wieler. Lifetimes of interstellar dust from cosmic ray exposure ages of presolar silicon carbide. Proceedings of the National Academy of Sciences, Jan. 13, 2020; DOI: 10.1073/pnas.1904573117 Yours, Paul H.
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