61K views · 291 reactions | President Trump and Joe Biden met for their last debate heading into the final sprint to Election Day. NPR’s Asma Khalid has more from the event — where new debate rules kept the conversation more focused on policy issues. | NPR | Facebook

647K views · 5.7K reactions | The Missoula and Bonneville floods are the most famous in North American history—but they may have only been regional expressions of something much bigger. New evidence shows floods with even greater peak discharges once ripped across the continent. This wasn’t just water—it was a continental-scale catastrophe. | The Randall Carlson | Facebook