From the iconic roots planted by Bill Monroe to innovators like Billy Strings and Molly Tuttle, bluegrass continues to thrive. The traditions expand, but they never stray far from their foundations.

Bluegrass icon Billy Strings (right) recorded his new album Me/And/Dad with his stepdad, Terry Barber. The album features songs that Strings learned from Barber during his childhood. Even as a toddler ...