“THE MOMENT THE WORLD FELT A BROTHERHOOD BREAK.”Their last duet of “How Deep Is Your Love” wasn’t meant to be a farewell — but that’s exactly what it became. Barry held the final note a little longer, Robin blinked back tears, and fans later realized they had witnessed history’s softest heartbreak: the sound of two brothers singing goodbye without saying the words.
When the Bee Gees released “How Deep Is Your Love” in 1977 as part of...