. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Contrary to conspiracy theories, the Earth’s core isn’t hollow. The dense, hot ball instead contains …
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. Hawaii is an ideal place to look for rock that might have originated from deep within Earth’s mantle.Credit: M. Patrick/USGS Handout/Anadolu via Getty Researchers have been challenging the textbook …