What's that you hear? That's right, It's an episode of nothing but mystery sounds! Are your ears up to the challenge? Plus, we'll hear an answer to the question: "How do squirrels find their nuts after they bury them?"

If you'd like to submit a mystery sound, you can share it with us here: brainson.org/contact.

And, you can support the show at brainson.org/fans.

Or, you can also buy our book, complete with Mystery Photos, at brainson.org/shop or at your favorite local bookstore.