I love it when I can learn something from an author. Especially if that author is Fletcher Delancey of Alsea fame. For example, I did not know what Mach 1 actually was, or why it was named such. I do now. I did not know that an object can produce more than one sonic boom, depending on its length. I do now. Read the piece at the link below and learn something cool.
You’ll be glad you did. Really!
via Sonic booms