When Earth and Venus fashioned, they each had international magma oceans deep underground. Earth’s has turned stable by now, however Venus’s may nonetheless stay hidden
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https://www.newscientist.com/article/2238537-venus-may-have-an-underground-magma-ocean-spanning-the-whole-planet/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
