On Writing Science Fiction: The Speed of Light

I like writing space opera. Space opera (for me) requires interstellar space travel. Any meaningful interstellar space travel requires that the characters be able to travel between points in the universe that are hundreds of millions or even billions of light years apart in the course of several hours. That means they must go faster than the speed of light. A lot faster. Hundreds of millions or even billions of times faster.

But I read an article recently on NPR where it discussed being...