Mastodon have spent two decades exploring the boundaries of what metal can be. They’ve released eight albums, and won a Grammy in 2018. Their latest, the double LP Hushed and Grim, dropped in October, and recently picked up a new Grammy nomination for Best Metal Performance. Host Elia Einhorn caught up with guitarist Bill Kelliher and drummer-singer Brann Dailor. We talked about how the group navigates changing musical directions as a unit, Brann’s more prominent vocal duties, and booting the happiness off their new record. You'll hear tracks from artist such as Mr. Bungle, Frank Sinatra, Mudhoney and more...