We use words and phrases every day, and usually never question why we say what we say. Why do we say “she’s on a wild goose chase” or “we laughed our heads off”? The surprising origin of ordinary phrases.

The Backstory: The Horrifying Afterlife of Lincoln's Guests at Ford's Theater
10:11

The Backstory: The Secret NASA Test That Almost Ended the Space Race
08:04

The Backstory: Space Junk Falling From the Sky
08:43