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When did the Isthmus of Panama form between North and South America?
Live Science via Yahoo News· 1 year agoThe Isthmus of Panama connected North and South America sometime between 23 million and 3 million...
What causes earthquakes? A geologist explains where they're most common and why
The Conversation via Yahoo News· 7 months agoA man works his way through the rubble of buildings in Marrakesh, Morocco, after a magnitude 6.8...