Have you heard about B Flat?

I just discovered a most interesting NPR story that first aired on February 16th (my sweetie's birthday!). Here's their blurb on this audio story:

For reasons that remain mostly mysterious, the note we call "B flat" does the oddest things. It aggravates alligators, it lurks in the stairwell of an office building, and it emanates from a supermassive black hole 250 million light years from Earth.

Listen and be delighted: Have You Heard about B Flat?