Smithsonianmag, Earth's Magnetic Field Nearly Collapsed 600 Million Years Ago. Then, Weird and Complex Life Evolved
https://www.smithsonianmag.com/smart-news/earths-magnetic-field-nearly-collapsed-600-million-years-ago-then-weird-and-complex-life-evolved-180984353/?utm_source=flipboard&utm_medium=activitypubPosted into Smartnews @smartnews
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