Album art by Alex Reisfar Minneapolis post-metal quartet Lungs have released their first song in three years ahead of the forthcoming Estuary . The band released their last album  As Dust Reaches the Earth  in 2015, and their new single, "Oak," is the first track the band has put out since the passing of long-time contributor Sean Michael Tobin last year. Lungs lull you from a sense of security with this track as they challenge the notion of stability.  "Oak" has a serene weight as it opens with twinkling guitars and softly sung lyrics; the words "Screaming skies / Born to die" float over a gentle instrumental. From there, "Oak" builds to a manic climax. The band's monolithic riffs and howling vocals are given that extra push with the help of guest vocals from Erin Severson of  Former Worlds .  Estuary by Lungs is slated to be released on October 18 via Entelodon Records . You can list to "Oak" and preorder the record belo...