An ancient leg bone uncovered in Africa might provide a step forward in understanding how dinosaurs and their close relatives evolved.
The 225-million-year-old fossil adds to growing evidence that an enigmatic group of reptiles known as the silesaurs played...
Yellowstone, a popular tourist destination and namesake of an equally popular TV show, was the first-ever national park in the United States. And bubbling beneath it—to this day—is one of Earth's most seismically active networks of...
