Explosions In The Sky are set to soundtrack an upcoming nature documentary on PBS about their home state of Texas.The band have recorded new album ‘Big Bend (An Original Soundtrack For Public Television)’ to accompany the documentary, which is titled Big Bend: The Wild Frontier Of Texas.The soundtrack is set to be released on October 1, and to preview the record, the band have shared its first single, ‘Climbing Bear’.Listen to ‘Climbing Bear’ and see the tracklist for ‘Big Bend (An Original