Meet the mysterious electrides

Ars Technica
By Rachel Brazil, Knowable MagazineJan 27, 2026, 2:48 pm239 pts
For close to a century, geoscientists have pondered a mystery: Where did Earth’s lighter elements go? Compared to amounts in the Sun and in some meteorites, Earth has less hydrogen, carbon, nitrogen, and sulfur, as well as noble gases like helium—in some cases, more than 99 percent less. Some of the…

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