A vacuum Raptor engine was recently test-fired after being "chilled to mimic conditions after a long coast period in space," ...

It's not just Niagara Falls. Many states in the US have impressive waterfalls. Some require a hike, but others are easy to ...

Enjoy dark skies for evening observing, then catch a meteor shower and a planetary conjunction in the morning sky this week.

Smithsonian curator Larry Bird shows off convention artifacts and other campaign memorabilia from the collection of the National Museum of American History (Smit ...