At Short Wave, it's an unspoken goal to ask and answer every question under the sun — after all, science underpins the entire universe. Today, we think we've finally met our curiosity match in mathematician Hannah Fry and geneticist Adam Rutherford. They're the duo behind the science mystery podcast The Curious Cases of Rutherford and Fry and co-authors of the new book Rutherford & Fry's Complete Guide to Absolutely Everything (Abridged). In the book, they ask questions like: How old is the Earth? Does your dog love you? And, is there free will?

Obviously, the middle question is of particular interest.

Are you also curious about a scientific mystery? DM us the old-fashioned way — over email at shortwave@npr.org. We'll open an investigation.

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