A federal judge blocked Trump from sending the National Guard to Oregon — again. Here’s what we know ...

Researchers found evidence that hydraulic systems might have been used to build Egypt's Step Pyramid of Djoser 4,500 years ...

The internal structure of the Egyptian pyramids was remarkably complex, with precise corridors and passageways, and burial ...

Plastic accumulating in our oceans and on our beaches has become a global crisis. Billions of pounds of plastic can be found in swirling convergences that make up about 40 percent of the world's ocean ...