I knew I was alone,” he observed later, “in a way that no earthling has ever been before.” That quote is immortalized on a ...

NASA astronaut Nichole “Vapor" Ayers captured a stunning photo of a Transient Luminous Event e bolt above a thunderstorm over the Desert Southwest. “Just. Wow. As we went over Mexico and the U.S. this ...

Captain America should be the most jingoistic superhero. But on this July Fourth, it's good to remember that he, like America, is conflicted.

From his solo adventures to major Avengers movies, here's a ranking of the best Captain America movies and what makes each one special.

The latest Captain America reexamines the early days of Steve Rogers after he was unfrozen in modern times and how he faced a new tyrant.

A new book details how the United States helped create a truly political animal.