But Gene Deana, head of the recorded-sound section at the Library of Congress, says he's thrilled to get it.

NPR: Library of Congress: Saving New Orleans Music

As described in the journal The Public Library of Science, Evans and his colleagues created the "marathon mice" by modifying the PPAR delta gene and these furry runners provide powerful clues as to how the PPAR delta gene actually works.

FORBES: Of Marathon Mice And Fat Men